Convert CONFIG_BOOTCOUNT_LIMIT to Kconfig

This converts the following to Kconfig:
   CONFIG_BOOTCOUNT_LIMIT

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Tested-by: Alex Kiernan <alex.kiernan@gmail.com>
Reviewed-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>
Acked-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>
diff --git a/configs/tqma6s_wru4_mmc_defconfig b/configs/tqma6s_wru4_mmc_defconfig
index 9c1bced..3f38cde 100644
--- a/configs/tqma6s_wru4_mmc_defconfig
+++ b/configs/tqma6s_wru4_mmc_defconfig
@@ -32,6 +32,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_BOOTCOUNT_LIMIT=y
 CONFIG_LED_STATUS=y
 CONFIG_LED_STATUS0=y
 CONFIG_LED_STATUS_BIT=0