* strd/ldrd are not supported by thumb

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25406 3ad0048d-3df7-0310-abae-a5850022a9f2
* PLD is not supported by thumb

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25407 3ad0048d-3df7-0310-abae-a5850022a9f2
* fixed a_load_reg_reg for thumb

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25408 3ad0048d-3df7-0310-abae-a5850022a9f2