Include IPQ8064 SBLs code in the coreboot bootblock

We want the coreboot build produce an image which can be run on the
target, even if the remaining parts of the bootprom (recovery path,
read-write stages, gbb, etc.) are not available yet.

This is achieved by including the Qualcomm SBLs blob in the bootblock.

CQ-DEPEND=CL:193518
BRANCH=None
BUG=chrome-os-partner:27784
TEST=manual

  . run the following commands inside chroot to confirm expected image
    layout (no actual code is executed on the target yet):

   $ emerge-storm coreboot
   $ \od -Ax -t x1 -v   /build/storm/firmware/coreboot.rom  2>/dev/null  | head -1
   000000 d1 dc 4b 84 34 10 d7 73 15 00 00 00 ff ff ff ff
   $ \od -Ax -t x1 -v   /build/storm/firmware/coreboot.rom  | grep 220000
   220000 05 00 00 00 03 00 00 00 00 00 00 00 00 00 01 2a

Original-Change-Id: I10e8b81c7bd90e4550a027573ad3a26c38c3808a
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/193540
(cherry picked from commit 64e193974e)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Idbdbeb9d229eff94a7a94af5dc4844a295458200
Reviewed-on: http://review.coreboot.org/7262
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/google/storm/Kconfig

@@ -22,7 +22,7 @@ if BOARD_GOOGLE_STORM
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y
 	select SOC_QC_IPQ806X
-	select BOARD_ROMSIZE_KB_1024
+	select BOARD_ROMSIZE_KB_4096
 
 config MAINBOARD_DIR
 	string