[PATCH v1.1] drivers: parisc: Update sba_iommu driver with proper printks

[Carlos Bilbao]

The code from the old SBA IOMMU manager is outdated when it comes to printks. 
Fix applying proper indentation and using pr_debug() instead of printk on 
debugging blocks. Also add a KERN_<LEVEL> where it is missing.

Signed-off-by: Carlos Bilbao <bilbao@xxxxxx>
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Changelog: Replace dev_dbg() for pr_debug()
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