i386: Fix <any_extend:insn>v4qiv4di2 expander

Fix a mode mismatch.

2021-05-18  Uroš Bizjak  <ubizjak@gmail.com>

gcc/
	* config/i386/sse.md (<any_extend:insn>v4qiv4di2):
	Fix a mode mismatch with operand 1.