drm/nouveau/core/memory: remove redundant assignments to variable ret

The variable ret is being initialized with a value that is never
read and it is being updated later with a new value. The initialization
is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/core/memory.c

@@ -140,7 +140,7 @@ nvkm_memory_new(struct nvkm_device *device, enum nvkm_memory_target target,
 {
 	struct nvkm_instmem *imem = device->imem;
 	struct nvkm_memory *memory;
-	int ret = -ENOSYS;
+	int ret;
 
 	if (unlikely(target != NVKM_MEM_TARGET_INST || !imem))
 		return -ENOSYS;