drm: panel: Add Elida KD50T048A to Sitronix ST7701 driver

Add KD50T048A MIPI-DSI panel, which is based on ST7701 chip.
Not sure what else to add to this commit message.

Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230213153816.213526-3-maccraft123mc@gmail.com