drm/mipi-dsi: Create devm device registration

[ Upstream commit a1419fb4 ]

Devices that take their data through the MIPI-DSI bus but are controlled
through a secondary bus like I2C have to register a secondary device on
the MIPI-DSI bus through the mipi_dsi_device_register_full() function.

At removal or when an error occurs, that device needs to be removed
through a call to mipi_dsi_device_unregister().

Let's create a device-managed variant of the registration function that
will automatically unregister the device at unbind.

Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210910101218.1632297-4-maxime@cerno.tech


Stable-dep-of: 81adbd3f ("drm: adv7511: Fix use-after-free in adv7533_attach_dsi()")
Signed-off-by: Sasha Levin <sashal@kernel.org>