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/theadorable_debug_defconfig b/configs/theadorable_debug_defconfig
index cb88ac6..aa6e5e1 100644
--- a/configs/theadorable_debug_defconfig
+++ b/configs/theadorable_debug_defconfig
@@ -44,6 +44,7 @@
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_OF_TRANSLATE=y
 CONFIG_SATA_MV=y
+CONFIG_BOOTCOUNT_LIMIT=y
 CONFIG_FPGA_ALTERA=y
 CONFIG_DM_GPIO=y
 # CONFIG_MMC is not set