spi: tegra210-quad: Multi-cs support

Tegra Grace and later chips can support upto 4 chip select lines
for QUAD SPI. Added new compatible for Tegra Grace.

Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Link: https://lore.kernel.org/r/20220607114659.54314-2-kyarlagadda@nvidia.com


Signed-off-by: Mark Brown <broonie@kernel.org>