driver core: add a helper to setup both the of_node and fwnode of a device

[ Upstream commit 43e76d46 ]

There are many places where both the fwnode_handle and the of_node of a
device need to be populated. Add a function which does both so that we
have consistency.

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: a26cc293 ("drm/mipi-dsi: Set the fwnode for mipi_dsi_device")
Signed-off-by: Sasha Levin <sashal@kernel.org>