i386: Remove 'i' from output operand constraint

It is not possible to use 'i' as output operand constraint.

gcc/ChangeLog:

	* config/i386/i386.md (*sub<mode>_3):
	Remove 'i' from operand 0 constraint.

(cherry picked from commit 75d7819b8f8d480d8dde4c42b90279a6c6168f04)
1 file changed