bk4r1: Re-convert CONFIG_AUTOBOOT_PROMPT et al to Kconfig

This converts the following to Kconfig:
   CONFIG_AUTOBOOT_PROMPT
   CONFIG_AUTOBOOT_KEYED
   CONFIG_AUTOBOOT_STOP_STR
Signed-off-by: NTom Rini <trini@konsulko.com>

configs/bk4r1_defconfig

@@ -18,6 +18,9 @@ CONFIG_BOOTDELAY=3
 CONFIG_USE_PREBOOT=y
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_HUSH_PARSER=y
+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_PROMPT="Enter passphrase to stop autoboot, booting in %d seconds\n"
+CONFIG_AUTOBOOT_STOP_STR="123"
 # CONFIG_CMD_ELF is not set
 CONFIG_CMD_MEMTEST=y
 CONFIG_SYS_MEMTEST_START=0x80010000

include/configs/bk4r1.h

@@ -57,12 +57,6 @@
 						"saveenv; " \
 						"fi; "
 
-/* Autoboot options */
-#define CONFIG_AUTOBOOT_KEYED
-#define CONFIG_AUTOBOOT_PROMPT	\
-	"Enter passphrase to stop autoboot, booting in %d seconds\n"
-#define CONFIG_AUTOBOOT_STOP_STR "123"
-
 #include <asm/arch/imx-regs.h>
 #include <linux/sizes.h>