mb/google/brya: Add romstage early graphics for nissa

1) Add all changes needed for early graphics
2) select MAINBOARD_USE_EARLY_LIBGFXINIT for nissa

The InnoLux (N156HCN-EBA C7) panel is used for the device tree.

BUG=b:296433986
TEST=On-screen text message seen during MRC training on Craask

Logs:
[NOTE ]  MRC: no data in 'RW_MRC_CACHE'
[SPEW ]  bootmode is set to: 0
[0.171409] DP PHY mode status not complete
[0.175509] DP PHY mode status not complete
[0.179799] DP PHY mode status not complete
[0.184087] DP PHY mode status not complete
[0.188376] DP PHY mode status not complete
[0.192665] DP PHY mode status not complete
[0.196954] DP PHY mode status not complete
[0.201243] DP PHY mode status not complete
[0.205532] DP PHY mode status not complete
[0.209821] DP PHY mode status not complete
[0.214110] DP PHY mode status not complete
[0.218397] DP PHY mode status not complete
[INFO ]  Informing user on-display of memory training.

Change-Id: I33cfc5d1f8c25c344e598befd21c50a78a65275a
Signed-off-by: Ronak Kanabar <ronak.kanabar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78932
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Dinesh Gehlot <digehlot@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index d281a6f..fcc2e63 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -96,6 +96,7 @@
 	select DRIVERS_AUDIO_SOF
 	select DRIVERS_INTEL_ISH
 	select MAINBOARD_DISABLE_STAGE_CACHE
+	select MAINBOARD_HAS_EARLY_LIBGFXINIT
 	select MEMORY_SOLDERDOWN
 	select SOC_INTEL_ALDERLAKE_PCH_N
 	select SOC_INTEL_CSE_LITE_COMPRESS_ME_RW