i386: Fix *vec_extractv2sf_1 and *vec_extractv2sf_1 shufps alternative [PR93828]

i386: Fix *vec_extractv2sf_1 and *vec_extractv2sf_1 shufps alternative [PR93828]

shufps moves two of the four packed single-precision floating-point values
from *destination* operand (first operand) into the low quadword of the
destination operand.  Match source operand to the destination.

	PR target/93828
	* config/i386/mmx.md (*vec_extractv2sf_1): Match source operand
	to destination operand for shufps alternative.
	(*vec_extractv2si_1): Ditto.

testsuite/ChangeLog:

	PR target/93828
	* g++.target/i386/pr93828.C: New test.