ASoC: SOF: imx: Fix devm_ioremap_resource check

ASoC: SOF: imx: Fix devm_ioremap_resource check

devm_ioremap_resource does not return NULL on error
but an error pointer so we need to use IS_ERR to check
the return code.

While at it also pass the error code to dev_err_probe
to improve logging.

Fixes: bc163baef570 ("ASoC: Use of_reserved_mem_region_to_resource() for "memory-region"")
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://patch.msgid.link/20250902102101.378809-1-daniel.baluta@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>