sunxi: Enable composite video out on the CHIP

The CHIP has a composite video output in the mini-Jack connector, alongside
with the 2 audio channels. Enable this output in U-Boot.

Signed-off-by: Alex Kaplan <kaplan2539@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

configs/CHIP_defconfig

@@ -4,6 +4,7 @@ CONFIG_MACH_SUN5I=y
 CONFIG_DRAM_TIMINGS_DDR3_800E_1066G_1333J=y
 # CONFIG_MMC is not set
 CONFIG_USB0_VBUS_PIN="PB10"
+CONFIG_VIDEO_COMPOSITE=y
 CONFIG_DEFAULT_DEVICE_TREE="sun5i-r8-chip"
 CONFIG_SPL=y
 CONFIG_OF_BOARD_SETUP=y