mb/google/dedede/var/cret: Disable SDCard controller

Cret doesn't support SDCard. Disable SDCard contorller for Cret.

BUG=b:191232222
TEST=Build and boot to check lspci

Cq-Depend: chromium:2993724
Signed-off-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Change-Id: I889f0545883aa75813dd91dc3e6a4dcfc246687f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55935
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

src/mainboard/google/dedede/variants/cret/overridetree.cb

@@ -100,6 +100,7 @@ chip soc/intel/jasperlake
 				end
 			end
 		end # USB xHCI
+		device pci 14.5 off  end # SDCard
 		device pci 15.0 on
 			chip drivers/i2c/generic
 				register "hid" = ""ELAN0000""