spi: mt65xx: Simplify probe function with dev_err_probe()

Switch to dev_err_probe() to remove all dev_err() -> return repeated
patterns, simplifying and shortening the probe function.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-7-angelogioacchino.delregno@collabora.com


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