ARM: DRA7-evm: Add mux data

Adding the mux data, manual and virtual mode
settings for DRA7-evm.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Vishal Mahaveer <vishalm@ti.com>