ARM: omap2plus_defconfig: Add dm816x USB PHY as a loadable module

This is needed for USB on dm816x-evm.

Cc: Bin Liu <binmlist@gmail.com>
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: George Cherian <george.cherian@ti.com>
Acked-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -402,6 +402,7 @@ CONFIG_PWM_TIECAP=m
 CONFIG_PWM_TIEHRPWM=m
 CONFIG_PWM_TWL=m
 CONFIG_PWM_TWL_LED=m
+CONFIG_PHY_DM816X_USB=m
 CONFIG_OMAP_USB2=m
 CONFIG_TI_PIPE3=y
 CONFIG_TWL4030_USB=m