drivers/pc80/rtc: Move sanitize_cmos()

Implementation depends on USE_OPTION_TABLE.

Change-Id: If7f8f478db3214842b6cc60cd77b4ea81cab6e3a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38195
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/lib/bootblock.c

@@ -18,6 +18,7 @@
 #include <bootblock_common.h>
 #include <console/console.h>
 #include <delay.h>
+#include <option.h>
 #include <pc80/mc146818rtc.h>
 #include <program_loading.h>
 #include <symbols.h>