Input: himax_hx83112b - use more descriptive register defines

Himax uses an AHB-style bus to communicate with different parts of the
display driver and touch controller system.
Use more descriptive names for the register and address defines.
The names were taken from a driver submission for the similar HX83102J
chip.

Signed-off-by: Felix Kaechele <felix@kaechele.ca>
Link: https://lore.kernel.org/all/TY0PR06MB561105A3386E9D76F429110D9E0F2@TY0PR06MB5611.apcprd06.prod.outlook.com/
Link: https://lore.kernel.org/r/20240620145019.156187-3-felix@kaechele.ca


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>