* MIPS: some clean up of assembler reader:
  - references cannot be in brackets
  - registers are only prefixed by dollar, never by percent
  - syntax x@LO is not supported, must be %lo(x).



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24633 3ad0048d-3df7-0310-abae-a5850022a9f2