cmd: fitupd: Convert CONFIG_UPDATE_TFTP and co.

Convert the CONFIG_UPDATE_TFTP and related symbols to Kconfig.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
diff --git a/common/Kconfig b/common/Kconfig
index dcab69d..d5bc37e 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -601,4 +601,25 @@
 
 endmenu
 
+menu "Update support"
+
+config UPDATE_TFTP
+	bool "Auto-update using fitImage via TFTP"
+	depends on FIT
+	help
+	  This option allows performing update of NOR with data in fitImage
+	  sent via TFTP boot.
+
+config UPDATE_TFTP_CNT_MAX
+	int "The number of connection retries during auto-update"
+	default 0
+	depends on UPDATE_TFTP
+
+config UPDATE_TFTP_MSEC_MAX
+	int "Delay in mSec to wait for the TFTP server during auto-update"
+	default 100
+	depends on UPDATE_TFTP
+
+endmenu
+
 source "common/spl/Kconfig"