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/stv0991_defconfig b/configs/stv0991_defconfig
index 6a3b5b8..40ca293 100644
--- a/configs/stv0991_defconfig
+++ b/configs/stv0991_defconfig
@@ -3,6 +3,7 @@
 CONFIG_SYS_MALLOC_F_LEN=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="stv0991"
 CONFIG_SYS_EXTRA_OPTIONS="stv0991"
+CONFIG_BOOTDELAY=3
 CONFIG_SYS_PROMPT="STV0991> "
 CONFIG_AUTOBOOT_KEYED=y
 CONFIG_AUTOBOOT_PROMPT="Hit SPACE in %d seconds to stop autoboot.\n"