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/tb100_defconfig b/configs/tb100_defconfig
index 83b1b56..2d157b2 100644
--- a/configs/tb100_defconfig
+++ b/configs/tb100_defconfig
@@ -4,6 +4,7 @@
 CONFIG_SYS_CLK_FREQ=500000000
 CONFIG_SYS_TEXT_BASE=0x84000000
 CONFIG_DEFAULT_DEVICE_TREE="abilis_tb100"
+CONFIG_BOOTDELAY=3
 CONFIG_SYS_PROMPT="[tb100]:~# "
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set