ARM: OMAP2+: Select USB PHY for AM335x SoC

Enable this option as it's required to use USB on AM335x SoC.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -222,6 +222,7 @@ CONFIG_USB_TEST=y
 CONFIG_NOP_USB_XCEIV=y
 CONFIG_OMAP_USB2=y
 CONFIG_OMAP_USB3=y
+CONFIG_AM335X_PHY_USB=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DEBUG=y
 CONFIG_USB_GADGET_DEBUG_FILES=y