ARM: at91/dt: add at91sam9x5 Display Module dtsi

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
ARM: at91/dt: define hlcdc node in at91sam9x5_lcd.dtsi

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
ARM: at91/dt: include lcd dtsi in at91sam9x5 dtsis

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
ARM: at91/dt: enable lcd support for at91sam9x5 SoCs

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>