Convert CONFIG_BOOTCOUNT_I2C to Kconfig

This converts the following to Kconfig:
  CONFIG_BOOTCOUNT_I2C

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
diff --git a/README b/README
index 5ab683d..a59f053 100644
--- a/README
+++ b/README
@@ -2270,12 +2270,6 @@
 - bootcount support:
 		CONFIG_AT91SAM9XE
 		enable special bootcounter support on at91sam9xe based boards.
-		CONFIG_BOOTCOUNT_I2C
-		enable support for the bootcounter on an i2c (like RTC) device.
-			CONFIG_SYS_I2C_RTC_ADDR = i2c chip address
-			CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for
-						    the bootcounter.
-			CONFIG_BOOTCOUNT_ALEN = address len
 		CONFIG_BOOTCOUNT_EXT
 		enable support for the bootcounter in EXT filesystem
 			CONFIG_SYS_BOOTCOUNT_ADDR = RAM address used for read
diff --git a/configs/ids8313_defconfig b/configs/ids8313_defconfig
index 5557402..5ca7703 100644
--- a/configs/ids8313_defconfig
+++ b/configs/ids8313_defconfig
@@ -35,6 +35,7 @@
 CONFIG_BOOTP_HOSTNAME=y
 CONFIG_BOOTP_SUBNETMASK=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_I2C=y
 # CONFIG_MMC is not set
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_PHYLIB=y
diff --git a/drivers/bootcount/Kconfig b/drivers/bootcount/Kconfig
index eabfd13..8c19ae6 100644
--- a/drivers/bootcount/Kconfig
+++ b/drivers/bootcount/Kconfig
@@ -46,6 +46,15 @@
 	  Store the bootcount in DRAM protected against against bit errors
 	  due to short power loss or holding a system in RESET.
 
+config BOOTCOUNT_I2C
+	bool "Boot counter on I2C device"
+	help
+	  Enable support for the bootcounter on an i2c (like RTC) device.
+	  CONFIG_SYS_I2C_RTC_ADDR = i2c chip address
+	  CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for
+	                              the bootcounter.
+	  CONFIG_BOOTCOUNT_ALEN = address len
+
 endchoice
 
 config SYS_BOOTCOUNT_SINGLEWORD
diff --git a/include/configs/ids8313.h b/include/configs/ids8313.h
index 1769224..08865f8 100644
--- a/include/configs/ids8313.h
+++ b/include/configs/ids8313.h
@@ -509,7 +509,6 @@
 #define CONFIG_MTD_PARTITIONS
 
 /* bootcount support */
-#define CONFIG_BOOTCOUNT_I2C
 #define CONFIG_BOOTCOUNT_ALEN	1
 #define CONFIG_SYS_BOOTCOUNT_ADDR	0x9
 
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index deb3c0c..e1b3fdc 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -146,7 +146,6 @@
 CONFIG_BOOGER
 CONFIG_BOOTBLOCK
 CONFIG_BOOTCOUNT_ALEN
-CONFIG_BOOTCOUNT_I2C
 CONFIG_BOOTFILE
 CONFIG_BOOTMAPSZ
 CONFIG_BOOTMODE