ARM: davinci: da850: Add lcdc node

Add lcdc node.
Also adds OF_DEV_AUXDATA for EHRPWM & ECAP driver to use da8xx_lcdc.0
clock.

Signed-off-by: Philip Avinash <avinashphilip@ti.com>
ARM: davinci: da850 evm: Add da850-evm LCD pannel support

Update lcdc node with panel timings for da850-evm along pin-mux info.

Signed-off-by: Philip Avinash <avinashphilip@ti.com>