[AVR] Implement LPMWRdZ pseudo-instruction's expansion.

FIXME: implementation is mostly copy-pasted from LDWRdPtr, so we should
refactor a bit and unify the two

Patch by Gerdo Erdi.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@314898 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed