mtd: rawnand: omap2: Select GPMC device driver for ARCH_K3

The GPMC device driver is required for NAND controller
to work on K3 Architecture. Select it if required.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20211221131757.2030-5-rogerq@kernel.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>