drm/dsi: Try to match non-DT DSI devices

Add a device name field in mipi_dsi_device. This name is different from
the actual dev name (which is of the format "hostname.reg"). When the
device is created via DT, this name is set to the modalias string.
In the non-DT case, the driver creating the DSI device provides the
name by populating a filed in mipi_dsi_device_info.

Matching for DT case would be as it was before. For the non-DT case,
we compare the device and driver names. Other buses (like I2C/SPI)
perform a non-DT match by comparing the device name and entries in the
driver's id_table. Such a mechanism isn't used for the DSI bus.

Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>