usb: host: xhci: plat: re-fact xhci_plat_priv for R-Car Gen3

Since the firmware_name is decided by xhci-rcar.c on R-Car Gen3 now,
this patch removes 2 things:
 - Remove struct xhci_plat_priv xhci_plat_renesas_rcar_r8a7796.
 - Remoce .firmware_name from xhci_plat_renesas_rcar_gen3.

The behavior is the same as before.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-plat.c

@@ -107,14 +107,6 @@ static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
 };
 
 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
-	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
-	.init_quirk = xhci_rcar_init_quirk,
-	.plat_start = xhci_rcar_start,
-	.resume_quirk = xhci_rcar_resume_quirk,
-};
-
-static const struct xhci_plat_priv xhci_plat_renesas_rcar_r8a7796 = {
-	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V3,
 	.init_quirk = xhci_rcar_init_quirk,
 	.plat_start = xhci_rcar_start,
 	.resume_quirk = xhci_rcar_resume_quirk,
@@ -145,7 +137,7 @@ static const struct of_device_id usb_xhci_of_match[] = {
 		.data = &xhci_plat_renesas_rcar_gen3,
 	}, {
 		.compatible = "renesas,xhci-r8a7796",
-		.data = &xhci_plat_renesas_rcar_r8a7796,
+		.data = &xhci_plat_renesas_rcar_gen3,
 	}, {
 		.compatible = "renesas,rcar-gen2-xhci",
 		.data = &xhci_plat_renesas_rcar_gen2,