Add Gemini Lake support

The SPI hardware is pretty much unchanged from Apollo Lake. However, the
IFD differs significantly enough to require special handling.

Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Change-Id: Ib5dcdf204166f44a8531c19b5f363b851d2ccd77
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/54276
Original-Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
diff --git a/ich_descriptors.h b/ich_descriptors.h
index c6bf5d8..727a31b 100644
--- a/ich_descriptors.h
+++ b/ich_descriptors.h
@@ -257,7 +257,7 @@
 
 struct ich_desc_south_strap {
 	union {
-		uint32_t STRPs[18]; /* current maximum: cougar point */
+		uint32_t STRPs[23]; /* current maximum: gemini lake */
 		struct { /* ich8 */
 			struct { /* STRP1 */
 				uint32_t ME_DISABLE		:1,