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/canmb_defconfig b/configs/canmb_defconfig
index 8d3b476..f1e3265 100644
--- a/configs/canmb_defconfig
+++ b/configs/canmb_defconfig
@@ -1,6 +1,7 @@
 CONFIG_PPC=y
 CONFIG_MPC5xxx=y
 CONFIG_TARGET_CANMB=y
+CONFIG_BOOTDELAY=5
 CONFIG_CMD_ASKENV=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y