src: Use '#include <timestamp.h>' when needed

Change-Id: Ic0483982e8115ae99367d08d8ed77b8a316f5405
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34231
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

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

@@ -35,7 +35,6 @@
 #include <soc/pci_devs.h>
 #include <soc/pm.h>
 #include <spi-generic.h>
-#include <timestamp.h>
 
 static const struct pad_config tpm_spi_configs[] = {
 #if CONFIG(SOC_INTEL_GLK)