gcc/
	* config/nds32/nds32-modes.def: Add vector mode V4QI V2HI V8QI V4HI
	V2SI.
	* config/nds32/iterators.md: Add vector mode iterators and attributes.

Co-Authored-By: Kito Cheng <kito.cheng@gmail.com>

From-SVN: r254853