soc/intel/quark: Add C bootblock

Add a bootblock which builds with C_ENVIRONMENT_BOOTBLOCK selected.
This is the first piece in supporting FSP 2.0.  Move esraminit from
romstage into the bootblock.  Replace cache_as_ram with
car_stage_entry.S and code in romstage.c

TEST=Build and run on Galileo Gen2

Change-Id: I14d2af2adb6e75d4bff1ebfb863196df04d07daf
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/15132
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/quark/Makefile.inc

@@ -18,6 +18,13 @@ ifeq ($(CONFIG_SOC_INTEL_QUARK),y)
 subdirs-y += romstage
 subdirs-y += ../../../cpu/x86/tsc
 
+bootblock-y += bootblock/esram_init.S
+bootblock-y += bootblock/bootblock.c
+bootblock-y += i2c.c
+bootblock-y += reg_access.c
+bootblock-y += tsc_freq.c
+bootblock-y += uart_common.c
+
 romstage-y += i2c.c
 romstage-y += memmap.c
 romstage-y += reg_access.c