ARM: dts: am43x-epos-evm: Add gpio keys pincontrol data.

These add pincontrol data for matrix gpio keys.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
ARM: dts: am43x-epos-evm: Add matrix gpio keys.

Add gpio keys node for am43x.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>