spi: spi-sg2044-nor: Add SPI-NOR controller for SG2042

Add support for SOPHGO SG2042 SPI-NOR flash controller.

Signed-off-by: Zixian Zeng <sycamoremoon376@gmail.com>
Reviewed-by: Chen Wang <unicorn_wang@outlook.com> & Tested-by: Chen Wang
Link: https://patch.msgid.link/20250720-sfg-spifmc-v4-3-033188ad801e@gmail.com


Reviewed-by: Chen Wang <unicorn_wang@outlook.com> & Tested-by: Chen Wang 
Signed-off-by: Mark Brown <broonie@kernel.org>