soc/intel/apollolake: Use CPU common library code

This patch makes SOC files to use common/block/cpu/cpulib.c
file's helper functions.

Change-Id: I529c67cf20253cf819d1c13849300788104b083c
Signed-off-by: Barnali Sarkar <barnali.sarkar@intel.com>
Reviewed-on: https://review.coreboot.org/19827
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/apollolake/bootblock/bootblock.c

@@ -17,6 +17,7 @@
 #include <arch/cpu.h>
 #include <bootblock_common.h>
 #include <device/pci.h>
+#include <intelblocks/cpulib.h>
 #include <intelblocks/fast_spi.h>
 #include <intelblocks/pcr.h>
 #include <intelblocks/rtc.h>