spi: add spi-mem driver for MediaTek MT7629 SoC

This patch adds spi-mem driver for MediaTek MT7629 SoC
to access SPI-NOR and SPI-NAND flashes.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
[jagan: squash MAINTAINERS file]
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
4 files changed