drm/vmwgfx: fix spelling mistake "Cound" -> "Could"

There is a spelling mistake in a DRM_ERROR message. Fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Roland Scheidegger <sroland@vmware.com>

drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c

@@ -3037,7 +3037,7 @@ static int vmw_cmd_dx_bind_streamoutput(struct vmw_private *dev_priv,
 	res = vmw_dx_streamoutput_lookup(vmw_context_res_man(ctx_node->ctx),
 					 cmd->body.soid);
 	if (IS_ERR(res)) {
-		DRM_ERROR("Cound not find streamoutput to bind.\n");
+		DRM_ERROR("Could not find streamoutput to bind.\n");
 		return PTR_ERR(res);
 	}