gm107/ir: make use of LOP32I for all immediates

LOP only allows to emit 19-bits immediates.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: <mesa-stable@lists.freedesktop.org>

src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp

@@ -1606,7 +1606,7 @@ CodeEmitterGM107::emitLOP()
       break;
    }
 
-   if (!longIMMD(insn->src(1))) {
+   if (insn->src(1).getFile() != FILE_IMMEDIATE) {
       switch (insn->src(1).getFile()) {
       case FILE_GPR:
          emitInsn(0x5c400000);