spi: Add support for Zynq Ultrascale+ MPSoC GQSPI controller

This patch adds support for GQSPI controller driver used by
Zynq Ultrascale+ MPSoC

Signed-off-by: Ranjit Waghmode <ranjit.waghmode@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --cc drivers/spi/Kconfig
Simple merge

diff --cc drivers/spi/Makefile
Simple merge

diff --cc drivers/spi/spi-zynqmp-gqspi.c
Simple merge