spi: axiado: Add driver for Axiado SPI DB controller

spi: axiado: Add driver for Axiado SPI DB controller

The Axiado SPI controller is present in AX3000 SoC and Evaluation Board.
This controller is operating in Host only mode.

Co-developed-by: Prasad Bolisetty <pbolisetty@axiado.com>
Signed-off-by: Prasad Bolisetty <pbolisetty@axiado.com>
Signed-off-by: Vladimir Moravcevic <vmoravcevic@axiado.com>
Link: https://patch.msgid.link/20260107-axiado-ax3000-soc-spi-db-controller-driver-v3-2-726e70cf19ad@axiado.com
Signed-off-by: Mark Brown <broonie@kernel.org>