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/woodburn_sd_defconfig b/configs/woodburn_sd_defconfig
index bb1ef0a..3b38130 100644
--- a/configs/woodburn_sd_defconfig
+++ b/configs/woodburn_sd_defconfig
@@ -2,6 +2,7 @@
 CONFIG_TARGET_WOODBURN_SD=y
 CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/woodburn/imximage.cfg"
+CONFIG_BOOTDELAY=3
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="woodburn U-Boot > "
 CONFIG_CMD_MMC=y