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/espresso7420_defconfig b/configs/espresso7420_defconfig
index 0fe2759..8d0bace 100644
--- a/configs/espresso7420_defconfig
+++ b/configs/espresso7420_defconfig
@@ -1,9 +1,8 @@
 CONFIG_ARM=y
 CONFIG_ARCH_EXYNOS=y
 CONFIG_ARCH_EXYNOS7=y
-CONFIG_TARGET_ESPRESSO7420=y
-CONFIG_DEFAULT_DEVICE_TREE="exynos7420-espresso7420"
 CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_DEFAULT_DEVICE_TREE="exynos7420-espresso7420"
 CONFIG_SYS_PROMPT="ESPRESSO7420 # "
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_SETEXPR is not set