[PowerPC] Fix inconsistent ImmMustBeMultipleOf for same instruction

Summary:
There are 4 instructions which have Inconsistent ImmMustBeMultipleOf in the
function PPCInstrInfo::instrHasImmForm, they are LFS, LFD, STFS, STFD.
These four instructions should set the ImmMustBeMultipleOf to 1 instead of 4.

Reviewed By: steven.zhang

Differential Revision: https://reviews.llvm.org/D54738


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@348109 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed