R600: Add ALUInst bit to tablegen definitions v2

v2:
  - Remove functions left over from a previous rebase.

Reviewed-by: Vincent Lejeune<vljn at ovi.com>
R600: Add support for GROUP_BARRIER instruction

Reviewed-by: Vincent Lejeune<vljn at ovi.com>
R600: Add local memory support via LDS

Reviewed-by: Vincent Lejeune<vljn at ovi.com>