Remove the last hasRawTextSupport call from R600.

There is nothing wrong with printing the disassembly section when printing
text. An hypothetical assembler would then produce a .o just like our
direct object emission produces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200583 91177308-0d34-0410-b5e6-96231b3b80d8