drivers/pc80/rtc: Remove stub for sanitize_cmos()

We only have a single call-site for this.

Change-Id: I7ab19c6ea4ef01334f4d229c5636b64f99c86119
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38182
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/lib/bootblock.c

@@ -56,7 +56,8 @@ static void bootblock_main_with_timestamp(uint64_t base_timestamp,
 	bootblock_soc_early_init();
 	bootblock_mainboard_early_init();
 
-	sanitize_cmos();
+	if (CONFIG(USE_OPTION_TABLE))
+		sanitize_cmos();
 
 	if (CONFIG(CMOS_POST))
 		cmos_post_init();