powerpc/mpc512x: enable USB support in defconfig

Enable USB EHCI, mass storage and USB gadget support.
Signed-off-by: Anatolij Gustschin <agust@denx.de>

arch/powerpc/configs/mpc512x_defconfig

@@ -102,6 +102,13 @@ CONFIG_FB=y
 CONFIG_FB_FSL_DIU=y
 # CONFIG_VGA_CONSOLE is not set
 CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_FSL=y
+# CONFIG_USB_EHCI_HCD_PPC_OF is not set
+CONFIG_USB_STORAGE=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_FSL_USB2=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_M41T80=y
 CONFIG_RTC_DRV_MPC5121=y