soc/intel/apollolake: Enable CACHE_MRC_SETTINGS

This enables CACHE_MRC_SETTINGS by default as well selects
timer configuration.

Change-Id: I0248001892ef763c39097848b5adc8c1befed1f0
Signed-off-by: Hannah Williams <hannah.williams@intel.com>
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14252
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/intel/apollolake/Makefile.inc

@@ -44,6 +44,7 @@ postcar-y += exit_car.S
 postcar-y += memmap.c
 postcar-y += mmap_boot.c
 postcar-$(CONFIG_SOC_UART_DEBUG) += uart_early.c
+postcar-y += tsc_freq.c
 
 CPPFLAGS_common += -I$(src)/soc/intel/apollolake/include