Migrate CONFIG_BOOTCOUNT_ALEN to Kconfig

Convert CONFIG_BOOTCOUNT_ALEN to Kconfig
Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>

drivers/bootcount/Kconfig

@@ -64,7 +64,6 @@ config BOOTCOUNT_I2C
 	  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_AT91
 	bool "Boot counter for Atmel AT91SAM9XE"
@@ -72,6 +71,14 @@ config BOOTCOUNT_AT91
 
 endchoice
 
+config BOOTCOUNT_ALEN
+	int "I2C address length"
+	default 1
+	depends on BOOTCOUNT_I2C
+	help
+	  Length of the the I2C address at SYS_BOOTCOUNT_ADDR for storing
+	  the boot counter.
+
 config SYS_BOOTCOUNT_SINGLEWORD
 	bool "Use single word to pack boot count and magic value"
 	depends on BOOTCOUNT_GENERIC

include/configs/ids8313.h

@@ -509,7 +509,6 @@
 #define CONFIG_MTD_PARTITIONS
 
 /* bootcount support */
-#define CONFIG_BOOTCOUNT_ALEN	1
 #define CONFIG_SYS_BOOTCOUNT_ADDR	0x9
 
 #define CONFIG_IMAGE_FORMAT_LEGACY

scripts/config_whitelist.txt

@@ -145,7 +145,6 @@ CONFIG_BOARD_TAURUS
 CONFIG_BOARD_TYPES
 CONFIG_BOOGER
 CONFIG_BOOTBLOCK
-CONFIG_BOOTCOUNT_ALEN
 CONFIG_BOOTFILE
 CONFIG_BOOTMAPSZ
 CONFIG_BOOTMODE