ARM: dts: Add SPI1 controller and s5c73m3 sensor node for TRATS2

This patch add dts entries required for the SPI bus used for
firware upload by the S5C73M3 camera.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>