Staging: pata_rdc: coding style fixes

This fixes a number of coding style issues in the pata_rdc.h file

Cc: Kevin Huang  <Kevin.Huang@rdc.com.tw>
Cc: Tomy Wang <Tomy.Wang@rdc.com.tw>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>