This converts the following to Kconfig:
   CONFIG_BOOTCOUNT_LIMIT
Signed-off-by: NLukasz Majewski <lukma@denx.de>
Tested-by: NAlex Kiernan <alex.kiernan@gmail.com>
Reviewed-by: NHannes Schmelzer <hannes.schmelzer@br-automation.com>
Acked-by: NHannes Schmelzer <hannes.schmelzer@br-automation.com>