display/drm/bridge: TC358775 DSI/LVDS driver

display/drm/bridge: TC358775 DSI/LVDS driver

This driver is tested with two panels individually with Apq8016-IFC6309 board
https://www.inforcecomputing.com/products/single-board-computers-sbc/qualcomm-snapdragon-410-inforce-6309-micro-sbc

1. 1366x768@60 auo,b101xtn01 data-mapping = "jeida-24"
2. 800x480@60 innolux,at070tn92 data-mapping = "vesa-24"

- power off sequence in proper order
- put_unaligned_be16, put_unaligned_le32 macros used
- static function for mode_valid
- len initialized
- MODE_CLOCK_HIGH handled properly
- bus_formats handled in mode_valid
- GENMASK and FIELD_PREP used
- Kconfig proper indentation
- error handling endpoint data-lanes
- check for bus_formats unsupported
- display_timings naming local variables
- help modified
- ~vsdelay dynamic value set based on the
  calculation of dsi speed, output speed, blanking
- panel->connector_type removed
- dual port implemented
- devm_drm_panel_bridge_add method used instead of panel
  description modified
- regulator enable and disable with proper orders and delays
  as per the spec
- removed drm_connector_status
- added bus_formats
- mdelay to usleep_range
- magic number to macros for CLRSI and mux registers
  description modified
- replaced u32 instead of uint32_t
- updated alphabetic order of headers
- added SPDX identifier license

Signed-off-by: Vinay Simha BN <simhavcs@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam.ravnborg@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1594388491-15129-2-git-send-email-simhavcs@gmail.com