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Use the dev_err_probe() helper to simplify error handling during probe.
This also handle scenario, when EDEFER is returned and useless error is
printed.

Fixes warnings as:
msm_iommu 7500000.iommu: could not get smmu_pclk
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20220206202945.465195-1-david@ixit.cz

Signed-off-by: Joerg Roedel <jroedel@suse.de>