Convert CONFIG_SYS_MONITOR_BASE to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_MONITOR_BASE

Note that for how this is re-used on some PowePC platforms, we introduce
CONFIG_SPL_SYS_MONITOR_BASE and CONFIG_TPL_SYS_MONITOR_BASE and use the
CONFIG_VAL macro to get the correct value at build time, in the code.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/omap3_logic_somlv_defconfig b/configs/omap3_logic_somlv_defconfig
index ecb3d47..c663162 100644
--- a/configs/omap3_logic_somlv_defconfig
+++ b/configs/omap3_logic_somlv_defconfig
@@ -15,6 +15,7 @@
 CONFIG_LTO=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_ANDROID_BOOT_IMAGE=y
+CONFIG_SYS_MONITOR_BASE=0x10000000
 CONFIG_BOOTCOMMAND="run autoboot"
 CONFIG_USE_PREBOOT=y
 CONFIG_PREBOOT="setenv preboot;saveenv;"