[AArch64] Use addAliasForDirective to support data directives

The AArch64 asm parser currently has custom parsing logic for .hword, .word, 
and .xword. Rather than use this custom logic, we can just use 
addAliasForDirective to enable the reuse of AsmParser::parseDirectiveValue.

Differential Revision: https://reviews.llvm.org/D47000


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333077 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed