[X86] Update SSE1 MOVLPSrm and MOVHPSrm isel patterns to ensure loads are...

[X86] Update SSE1 MOVLPSrm and MOVHPSrm isel patterns to ensure loads are non-volatile before folding.

These patterns use 128-bit loads, but the instructions only load
64-bits. We shouldn't narrow the load if its volatile.

Fixes another variant of PR42079

llvm-svn: 365225