m68k: cleaned ancient silly debug mess from a_loadaddr_ref_reg. no functional changes.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28076 3ad0048d-3df7-0310-abae-a5850022a9f2
m68k: disabled PEA debug comment accidentally left in

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28077 3ad0048d-3df7-0310-abae-a5850022a9f2