mb/google/rex/variants/deku: Add SSD card config

BUG=b:305793886
TEST=util/abuild/abuild -p none -t google/rex -x -a -b deku

Change-Id: I167a02bf2219c6ef8e0093956a649305c8e8f76b
Signed-off-by: Eran Mitrani <mitrani@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78486
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

src/mainboard/google/rex/variants/deku/overridetree.cb

@@ -28,6 +28,14 @@ chip soc/intel/meteorlake
 	}"
 
 	device domain 0 on
+		device ref pcie_rp11 on
+			# Enable SSD Card PCIE 11 using clk 7
+			register "pcie_rp[PCH_RP(11)]" = "{
+				.clk_src = 7,
+				.clk_req = 7,
+				.flags = PCIE_RP_LTR | PCIE_RP_AER,
+			}"
+		end	# PCIE11 SSD card
 		device ref i2c4 on
 			chip drivers/i2c/tpm
 				register "hid" = ""GOOG0005""