soc/amd/genoa/chip.h: drop unneeded xhci2_enable

Genoa has no XHCI2 controller, so drop this devicetree option.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I5b995bb1c0cf0032be25ab215333bc966427f7ad
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79454
Reviewed-by: Varshit Pandya <pandyavarshit@gmail.com>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/genoa/chip.h

@@ -27,7 +27,6 @@ struct usb31_phy_settings {
 struct soc_usb_config {
 	uint8_t xhci0_enable : 1;
 	uint8_t xhci1_enable : 1;
-	uint8_t xhci2_enable : 1;
 	struct {
 		uint8_t port0 : 4;
 		uint8_t port1 : 4;