drm: use ENOMEM for drmm_kzalloc allocation failures

Other callers of drmm_kzalloc already return -ENOMEM on allocation
failure. Change EINVAL to ENOMEM for consistency.

Signed-off-by: Niels Dossche <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_encoder.c

···
 
 	container = drmm_kzalloc(dev, size, GFP_KERNEL);
 	if (!container)
-		return ERR_PTR(-EINVAL);
+		return ERR_PTR(-ENOMEM);
 
 	encoder = container + offset;