Convert CONFIG_BOOTP_SERVERIP to Kconfig

This converts the following to Kconfig:
   CONFIG_BOOTP_SERVERIP

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/README b/README
index 560a181..65b3a40 100644
--- a/README
+++ b/README
@@ -1203,9 +1203,6 @@
 		CONFIG_BOOTP_VENDOREX
 		CONFIG_BOOTP_MAY_FAIL
 
-		CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip
-		environment variable, not the BOOTP server.
-
 		CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found
 		after the configured retry count, the call will fail
 		instead of starting over.  This can be used to fail over
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index a6c7fc5..06ac349 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -173,6 +173,7 @@
 	bool "STM32 Extended TrustZone Protection"
 	depends on STM32MP15x
 	default y
+	imply BOOTP_SERVERIP
 	help
 	  Say y to enable STM32 Extended TrustZone Protection
 
diff --git a/configs/adp-ae3xx_defconfig b/configs/adp-ae3xx_defconfig
index b79b5b6f..9f7b268 100644
--- a/configs/adp-ae3xx_defconfig
+++ b/configs/adp-ae3xx_defconfig
@@ -31,6 +31,7 @@
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_BOOTP_SERVERIP=y
 CONFIG_DM=y
 CONFIG_CLK=y
 CONFIG_MMC=y
diff --git a/configs/adp-ag101p_defconfig b/configs/adp-ag101p_defconfig
index 503f2ae..49108ec 100644
--- a/configs/adp-ag101p_defconfig
+++ b/configs/adp-ag101p_defconfig
@@ -29,6 +29,7 @@
 CONFIG_ENV_ADDR=0x80140000
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_BOOTP_SERVERIP=y
 CONFIG_DM=y
 CONFIG_MMC=y
 CONFIG_FTSDC010=y
diff --git a/configs/bitmain_antminer_s9_defconfig b/configs/bitmain_antminer_s9_defconfig
index ffeee33..26dce00 100644
--- a/configs/bitmain_antminer_s9_defconfig
+++ b/configs/bitmain_antminer_s9_defconfig
@@ -57,6 +57,7 @@
 CONFIG_ENV_IS_IN_NAND=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_BOOTP_SERVERIP=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_BOOTCOUNT_LIMIT=y
 CONFIG_FPGA_XILINX=y
diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
index d849989..bdf805a 100644
--- a/configs/sandbox64_defconfig
+++ b/configs/sandbox64_defconfig
@@ -96,6 +96,7 @@
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
+CONFIG_BOOTP_SERVERIP=y
 CONFIG_DM_DMA=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 4f41358..70c6b2f 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -121,6 +121,7 @@
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
+CONFIG_BOOTP_SERVERIP=y
 CONFIG_DM_DMA=y
 CONFIG_DEVRES=y
 CONFIG_DEBUG_DEVRES=y
diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index 4d5a73f..3f69fb7 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -76,6 +76,7 @@
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
+CONFIG_BOOTP_SERVERIP=y
 CONFIG_DM_DMA=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
diff --git a/configs/sandbox_noinst_defconfig b/configs/sandbox_noinst_defconfig
index 490368e..6679c43 100644
--- a/configs/sandbox_noinst_defconfig
+++ b/configs/sandbox_noinst_defconfig
@@ -96,6 +96,7 @@
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
+CONFIG_BOOTP_SERVERIP=y
 CONFIG_SPL_DM=y
 CONFIG_DM_DMA=y
 CONFIG_REGMAP=y
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index f1a54ac..fddf132 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -98,6 +98,7 @@
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
+CONFIG_BOOTP_SERVERIP=y
 CONFIG_SPL_DM=y
 CONFIG_DM_DMA=y
 CONFIG_REGMAP=y
diff --git a/include/configs/adp-ae3xx.h b/include/configs/adp-ae3xx.h
index 58e8526..cd32b88 100644
--- a/include/configs/adp-ae3xx.h
+++ b/include/configs/adp-ae3xx.h
@@ -17,8 +17,6 @@
 
 #define CONFIG_SKIP_TRUNOFF_WATCHDOG
 
-#define CONFIG_BOOTP_SERVERIP
-
 #ifdef CONFIG_SKIP_LOWLEVEL_INIT
 #ifdef CONFIG_OF_CONTROL
 #undef CONFIG_OF_SEPARATE
diff --git a/include/configs/adp-ag101p.h b/include/configs/adp-ag101p.h
index 1022764..e46c8f0 100644
--- a/include/configs/adp-ag101p.h
+++ b/include/configs/adp-ag101p.h
@@ -15,8 +15,6 @@
  */
 #define CONFIG_USE_INTERRUPT
 
-#define CONFIG_BOOTP_SERVERIP
-
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 #define CONFIG_MEM_REMAP
 #endif
diff --git a/include/configs/bitmain_antminer_s9.h b/include/configs/bitmain_antminer_s9.h
index a9f45f1..2bcd0e1 100644
--- a/include/configs/bitmain_antminer_s9.h
+++ b/include/configs/bitmain_antminer_s9.h
@@ -9,8 +9,6 @@
 #define CONFIG_SYS_SDRAM_BASE	0x00000000
 #define CONFIG_SYS_SDRAM_SIZE	0x40000000
 
-#define CONFIG_BOOTP_SERVERIP
-
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"autoload=no\0" \
 	"pxefile_addr_r=0x2000000\0" \
diff --git a/include/configs/sandbox.h b/include/configs/sandbox.h
index 5c2f3d8..9e0e8c7 100644
--- a/include/configs/sandbox.h
+++ b/include/configs/sandbox.h
@@ -25,8 +25,6 @@
 #define CONFIG_SYS_BAUDRATE_TABLE	{4800, 9600, 19200, 38400, 57600,\
 					115200}
 
-#define CONFIG_BOOTP_SERVERIP
-
 #ifndef SANDBOX_NO_SDL
 #define CONFIG_SANDBOX_SDL
 #endif
diff --git a/include/configs/stm32mp15_common.h b/include/configs/stm32mp15_common.h
index dab679f..2bbc8de 100644
--- a/include/configs/stm32mp15_common.h
+++ b/include/configs/stm32mp15_common.h
@@ -57,7 +57,6 @@
 /* Ethernet need */
 #ifdef CONFIG_DWC_ETH_QOS
 #define CONFIG_SERVERIP                 192.168.1.1
-#define CONFIG_BOOTP_SERVERIP
 #define CONFIG_SYS_AUTOLOAD		"no"
 #endif
 
diff --git a/net/Kconfig b/net/Kconfig
index e5b5837..2ae9d6a 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -116,4 +116,11 @@
 	  is wrong then the packet is discussed and an error is shown, like
 	  "UDP wrong checksum 29374a23 30ff3826"
 
+config BOOTP_SERVERIP
+	bool "Use the 'serverip' env var for tftp, not bootp"
+	help
+	  Enable this if the TFTP server will be the 'serverip' environment
+	  variable, not the BOOTP server. This affects the operation of both
+	  bootp and tftp.
+
 endif   # if NET