soc/intel/tigerlake: Utilize vbt data size Kconfig option

From Tigerlake FSP v3373 onwards vbt binary size changed from 8KiB
to 9KiB. Commit cf5d58328f had changed
the size from 8 to 9 Kib in drivers/gma. This change makes use of
Kconfig option to pick the size for tigerlake.

BUG=b:171401992
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: I21a0bba9ae01bac326f0f931641c98e8d308310f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47209
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Wonkyu Kim <wonkyu.kim@intel.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/tigerlake/Kconfig

@@ -186,6 +186,10 @@ config CHROMEOS
 config TPM_CR50
 	select CR50_USE_LONG_INTERRUPT_PULSES
 
+config VBT_DATA_SIZE_KB
+	int
+	default 9
+
 config VBOOT
 	select VBOOT_SEPARATE_VERSTAGE
 	select VBOOT_MUST_REQUEST_DISPLAY