usb: dwc3: Move CONFIG_USB_DWC3_PHY_* to Kconfig

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
diff --git a/configs/am43xx_evm_ethboot_defconfig b/configs/am43xx_evm_ethboot_defconfig
index dc25719..5963437 100644
--- a/configs/am43xx_evm_ethboot_defconfig
+++ b/configs/am43xx_evm_ethboot_defconfig
@@ -14,6 +14,7 @@
 CONFIG_USB_DWC3=y
 CONFIG_USB_DWC3_GADGET=y
 CONFIG_USB_DWC3_OMAP=y
+CONFIG_USB_DWC3_PHY_OMAP=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_OF_LIBFDT=y