gm107/ir: fix arg coalescing for indirect textures

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.3" <mesa-stable@lists.freedesktop.org>
gm107/ir: fix manual TXD for array targets

This parallels the fixes in commit afea9bae.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.3" <mesa-stable@lists.freedesktop.org>