soc: Remove unneeded include <pc80/mc146818rtc.h>

Change-Id: I64e061017ee0b1202ce5482b26c7550e4cd0f0a7
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/30197
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/soc/intel/skylake/cpu.c

@@ -40,7 +40,6 @@
 #include <intelblocks/sgx.h>
 #include <intelblocks/smm.h>
 #include <intelblocks/vmx.h>
-#include <pc80/mc146818rtc.h>
 #include <soc/cpu.h>
 #include <soc/msr.h>
 #include <soc/pci_devs.h>