common: bootdelay: move CONFIG_BOOTDELAY into a Kconfig option

move CONFIG_BOOTDELAY into a Kconfig option. Used for this
purpose the moveconfig.py tool in tools.

Signed-off-by: Heiko Schocher <hs@denx.de>

Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
diff --git a/configs/T1040D4RDB_NAND_defconfig b/configs/T1040D4RDB_NAND_defconfig
index a07a59a..9295c61 100644
--- a/configs/T1040D4RDB_NAND_defconfig
+++ b/configs/T1040D4RDB_NAND_defconfig
@@ -7,6 +7,7 @@
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_SYS_EXTRA_OPTIONS="PPC_T1040,T1040D4RDB,RAMBOOT_PBL,SPL_FSL_PBL,NAND,T104XD4RDB,SYS_FSL_DDR4"
+CONFIG_BOOTDELAY=10
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_MMC=y