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/eb_cpu5282_defconfig b/configs/eb_cpu5282_defconfig
index 55d5552..bf9177b 100644
--- a/configs/eb_cpu5282_defconfig
+++ b/configs/eb_cpu5282_defconfig
@@ -2,6 +2,7 @@
 CONFIG_TARGET_EB_CPU5282=y
 CONFIG_SYS_TEXT_BASE=0xFF000000
 CONFIG_SYS_EXTRA_OPTIONS="SYS_MONITOR_BASE=0xFF000400"
+CONFIG_BOOTDELAY=5
 CONFIG_SYS_PROMPT="\nEB+CPU5282> "
 # CONFIG_CMD_LOADB is not set
 CONFIG_CMD_I2C=y