ARM: imx: update imx_v6_v7_defconfig

Update the IMX v6/v7 defconfig for the SolidRun HummingBoard:
- Add AT803X ethernet phy
- Add consumer IR devices

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>