configs: k2g_evm_defconfig: disable XHCI_DWC3 and enable KEYSTONE_USB_PHY

KEYSTONE_USB_PHY is now required for proper USB operations.
XHCI_DWC3 can be disabled as the xhci-dwc3 is not used anymore
USB_DWC3_GADGET can also be removed, it is now selected automatically.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
diff --git a/configs/k2g_evm_defconfig b/configs/k2g_evm_defconfig
index 2780451..865a643 100644
--- a/configs/k2g_evm_defconfig
+++ b/configs/k2g_evm_defconfig
@@ -63,6 +63,7 @@
 CONFIG_DRIVER_TI_KEYSTONE_NET=y
 CONFIG_PHY=y
 CONFIG_NOP_PHY=y
+CONFIG_KEYSTONE_USB_PHY=y
 CONFIG_REMOTEPROC_TI_POWER=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
@@ -73,9 +74,7 @@
 CONFIG_DM_USB=y
 CONFIG_DM_USB_GADGET=y
 CONFIG_USB_XHCI_HCD=y
-CONFIG_USB_XHCI_DWC3=y
 CONFIG_USB_DWC3=y
-CONFIG_USB_DWC3_GADGET=y
 CONFIG_USB_DWC3_GENERIC=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DOWNLOAD=y