cmd/compile: remove gc.eqtype in comments

golang.org/cl/143180 changed gc.eqtype to types.Identical, but gc.eqtype
is still mentioned in some comments. Remove them and update comments to
mention new functions instead.

Change-Id: I6c5eece5221f524556ee55db80de0e4bdfaf166e
Reviewed-on: https://go-review.googlesource.com/c/go/+/191357
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go
index 64716d8..15850d7 100644
--- a/src/cmd/compile/internal/gc/order.go
+++ b/src/cmd/compile/internal/gc/order.go
@@ -64,7 +64,7 @@
 func (o *Order) newTemp(t *types.Type, clear bool) *Node {
 	var v *Node
 	// Note: LongString is close to the type equality we want,
-	// but not exactly. We still need to double-check with eqtype.
+	// but not exactly. We still need to double-check with types.Identical.
 	key := t.LongString()
 	a := o.free[key]
 	for i, n := range a {
diff --git a/src/cmd/compile/internal/types/type.go b/src/cmd/compile/internal/types/type.go
index e2f3e66..e4ab40c 100644
--- a/src/cmd/compile/internal/types/type.go
+++ b/src/cmd/compile/internal/types/type.go
@@ -1013,7 +1013,7 @@
 // TODO(josharian): make this safe for recursive interface types
 // and use in signatlist sorting. See issue 19869.
 func (t *Type) cmp(x *Type) Cmp {
-	// This follows the structure of eqtype in subr.go
+	// This follows the structure of function identical in identity.go
 	// with two exceptions.
 	// 1. Symbols are compared more carefully because a <,=,> result is desired.
 	// 2. Maps are treated specially to avoid endless recursion -- maps