Rename SPL_USB_HOST_SUPPORT to SPL_USB_HOST

Rename this option so that CONFIG_IS_ENABLED can be used with it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index c8bf4ae..8d53ba7 100644
--- a/drivers/usb/dwc3/dwc3-generic.c
+++ b/drivers/usb/dwc3/dwc3-generic.c
@@ -163,7 +163,7 @@
 };
 #endif
 
-#if defined(CONFIG_SPL_USB_HOST_SUPPORT) || \
+#if defined(CONFIG_SPL_USB_HOST) || \
 	!defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_HOST)
 static int dwc3_generic_host_probe(struct udevice *dev)
 {
@@ -320,7 +320,7 @@
 			driver = "dwc3-generic-peripheral";
 #endif
 			break;
-#if defined(CONFIG_SPL_USB_HOST_SUPPORT) || !defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_SPL_USB_HOST) || !defined(CONFIG_SPL_BUILD)
 		case USB_DR_MODE_HOST:
 			debug("%s: dr_mode: HOST\n", __func__);
 			driver = "dwc3-generic-host";