board-dt-sama5: use macro to simplify the code link sensor to soc camera

Signed-off-by: Josh Wu <josh.wu@atmel.com>
board-dt-sama5: add sensor ov7740 & ov9740 support in sama5 board

Signed-off-by: Josh Wu <josh.wu@atmel.com>
sama5_defconfig: add ov7740 & ov9740 support in defconfig

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Merge branch 'at91-3.10-trunk/v3.10_lcd+heo+isi' into linux-3.10-at91