cmd/compile: aggregate rules that fold LEA/ADD into MOVx ops
cmd/compile: aggregate rules that fold LEA/ADD into MOVx ops

No functional changes.

Change-Id: I4a3642d6dedf602a62f5a69cb630d35965ad6b98
Reviewed-on: https://go-review.googlesource.com/94763
Reviewed-by: Keith Randall <8c99c3a9284e493be632950b84cd789d08ed3e9d@golang.org>

Cofyc/go,josharian/go,Cofyc/go,cloudflare/go,CAFxX/go,CAFxX/go,cloudflare/go,cloudflare/go,akutz/go,nawawi/go,cloudflare/go,codestation/go,golang/go,golang/go,CAFxX/go,CAFxX/go,nawawi/go,josharian/go,Cofyc/go,josharian/go,codestation/go,akutz/go,Cofyc/go,akutz/go,codestation/go,nawawi/go,golang/go,akutz/go,akutz/go,cloudflare/go,codestation/go,CAFxX/go,cloudflare/go,nawawi/go,Cofyc/go,josharian/go,golang/go,codestation/go,CAFxX/go,Cofyc/go,josharian/go,cloudflare/go,akutz/go,CAFxX/go,golang/go,josharian/go,josharian/go,CAFxX/go,nawawi/go,golang/go,cloudflare/go,Cofyc/go,nawawi/go,golang/go,golang/go,nawawi/go,codestation/go,codestation/go,nawawi/go,akutz/go,akutz/go,codestation/go,Cofyc/go,josharian/go