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>
diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index bfa80a1..c3c60fd 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -222,6 +222,7 @@
 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