drivers/intel/gma: Increase vbt_data size

With TGL FSP v3373 onwards vbt binary size changed from 8KiB
to 9KiB. Due to which cbfsf_decompression_info check failed
when trying to load vbt binary from cbfs because vbt
decompressed_size was greater than vbt_data size. This caused
Graphics init and fw screen issues. Increase the vbt_data to
9KiB to accommodate new vbt binary.

BUG=b:170656067
BRANCH=none
TEST=build and boot delbin and verify fw screen is loaded

Signed-off-by: Srinidhi N Kaushik <srinidhi.n.kaushik@intel.com>
Change-Id: If6ffce028f9e8bc14596bbc0a3f1476843a9334e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46374
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Dossym Nurmukhanov <dossym@google.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/drivers/intel/gma/opregion.c

@@ -19,7 +19,7 @@ const char *mainboard_vbt_filename(void)
 	return "vbt.bin";
 }
 
-static char vbt_data[8 * KiB];
+static char vbt_data[9 * KiB];
 static size_t vbt_data_sz;
 
 void *locate_vbt(size_t *vbt_size)