[AMDGPU][MC] Enable lds_direct operand for v_readfirstlane_b32, v_readlane_b32 and v_writelane_b32

See bug 40662: https://bugs.llvm.org/show_bug.cgi?id=40662

Reviewers: artem.tamazov, arsenm, rampitec

Differential Revision: https://reviews.llvm.org/D58713

llvm-svn: 355312