soc/amd/cezanne: Enable GENERIC_GPIO_LIB

Needed so we write the correct resource into the ACPI tables.

BUG=b:183737011
TEST=Boot OS and see GPIO devices working

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I2ba4349e0ed500912db40aa6ef9b649046f4358f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51961
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/cezanne/Kconfig

@@ -20,6 +20,7 @@ config SOC_SPECIFIC_OPTIONS
 	select DRIVERS_USB_PCI_XHCI
 	select FSP_COMPRESS_FSP_M_LZMA
 	select FSP_COMPRESS_FSP_S_LZMA
+	select GENERIC_GPIO_LIB
 	select HAVE_ACPI_TABLES
 	select HAVE_CF9_RESET
 	select HAVE_EM100_SUPPORT