Convert CONFIG_BOOTCOUNT_EXT to Kconfig

This converts the following to Kconfig:
  CONFIG_BOOTCOUNT_EXT

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>

README

@@ -2270,13 +2270,6 @@ The following options need to be configured:
 - bootcount support:
 		CONFIG_AT91SAM9XE
 		enable special bootcounter support on at91sam9xe based boards.
-		CONFIG_BOOTCOUNT_EXT
-		enable support for the bootcounter in EXT filesystem
-			CONFIG_SYS_BOOTCOUNT_ADDR = RAM address used for read
-                                                    and write.
-			CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE = interface
-			CONFIG_SYS_BOOTCOUNT_EXT_DEVPART = device and part
-			CONFIG_SYS_BOOTCOUNT_EXT_NAME = filename
 
 - Show boot progress:
 		CONFIG_SHOW_BOOT_PROGRESS

configs/ge_b450v3_defconfig

@@ -27,6 +27,8 @@ CONFIG_CMD_FS_GENERIC=y
 CONFIG_DOS_PARTITION=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_EXT=y
+CONFIG_SYS_BOOTCOUNT_EXT_DEVPART="1:5"
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_NETDEVICES=y

configs/ge_b650v3_defconfig

@@ -27,6 +27,8 @@ CONFIG_CMD_FS_GENERIC=y
 CONFIG_DOS_PARTITION=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_EXT=y
+CONFIG_SYS_BOOTCOUNT_EXT_DEVPART="1:5"
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_NETDEVICES=y

configs/ge_b850v3_defconfig

@@ -27,6 +27,8 @@ CONFIG_CMD_FS_GENERIC=y
 CONFIG_DOS_PARTITION=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_EXT=y
+CONFIG_SYS_BOOTCOUNT_EXT_DEVPART="1:5"
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_NETDEVICES=y

include/configs/ge_bx50v3.h

@@ -263,10 +263,6 @@
 
 #define CONFIG_BCH
 
-#define CONFIG_BOOTCOUNT_EXT
-#define CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE	"mmc"
-#define CONFIG_SYS_BOOTCOUNT_EXT_DEVPART	"1:5"
-#define CONFIG_SYS_BOOTCOUNT_EXT_NAME		"/boot/failures"
 #define CONFIG_SYS_BOOTCOUNT_ADDR		0x7000A000
 
 #endif	/* __GE_BX50V3_CONFIG_H */