mb/google/fatcat/var/fatcat: Enable UFS controller

This commit enables the UFS controller on the Google Fatcat mainboard
based on FW_CONFIG.

This change allows the system to utilize the UFS storage device.

TEST=Built google/fatcat with UFS enabled.

Change-Id: Ib32523e7865b2ea23d990b2cf9b7406a4d6ecde3
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85192
Reviewed-by: Pranava Y N <pranavayn@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>

src/mainboard/google/fatcat/variants/fatcat/overridetree.cb

@@ -307,6 +307,11 @@ chip soc/intel/pantherlake
 			end
 		end
 
+		device ref ufs on
+			probe STORAGE STORAGE_UFS
+			probe STORAGE STORAGE_UNKNOWN
+		end
+
 		device ref pcie_rp2 on
 			probe CELLULAR CELLULAR_PCIE
 			register "pcie_rp[PCIE_RP(2)]" = "{