spi: atmel-quadspi: Use devm_ clock management

Clean up error handling by using the new devm_
clock handling functions. This should make it
easier to add new code, as we can eliminate the
"goto ladder" in probe().

Signed-off-by: Bence Csókás <csokas.bence@prolan.hu>
Link: https://patch.msgid.link/20241219142851.430959-1-csokas.bence@prolan.hu


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