sunxi: A13-Olinuxino: Enable the USB OTG controller

The A13-Olinuxino has a mini-USB connector that can be used to power up
the board and as an OTG connector.

Since we have already some USB host-only ports right beside this one,
enable it in gadget mode

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

configs/A13-OLinuXino_defconfig

@@ -4,6 +4,7 @@ CONFIG_MACH_SUN5I=y
 CONFIG_DRAM_CLK=408
 CONFIG_DRAM_EMR1=0
 CONFIG_MMC0_CD_PIN="PG0"
+CONFIG_USB0_VBUS_DET="PG1"
 CONFIG_USB1_VBUS_PIN="PG11"
 CONFIG_AXP_GPIO=y
 # CONFIG_VIDEO_HDMI is not set
@@ -11,6 +12,8 @@ CONFIG_VIDEO_VGA_VIA_LCD=y
 CONFIG_VIDEO_VGA_VIA_LCD_FORCE_SYNC_ACTIVE_HIGH=y
 CONFIG_VIDEO_LCD_POWER="AXP0-0"
 CONFIG_VIDEO_LCD_BL_PWM="PB2"
+CONFIG_USB_MUSB_SUNXI=y
+CONFIG_USB_MUSB_GADGET=y
 CONFIG_DEFAULT_DEVICE_TREE="sun5i-a13-olinuxino"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL=y