oxnas: sata_oxnas: refactoring phase 2

 - replaced // comments by /* comments */
 - added line-breaks where needed
 - fixed white-space according to kernel style
 - fixed some obvious spelling mistakes in comments and printks
 - removed some unneeded left-overs imported from vendor code-base
 - replaced printk(...) by libata macros where possible

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 43767