dt-bindings: reset: thead,th1520-reset: add more VOSYS resets

dt-bindings: reset: thead,th1520-reset: add more VOSYS resets

VOSYS contains more resets for a display pipeline, includes ones for the
display controller (called DPU in the manual), the HDMI controller and 2
MIPI DSI controllers.

Allocate IDs for these resets in the dt binding header file.

Now all peripheral related VOSYS reset controls are here, only the bus
matrix / IOPMP ones are missing, which shouldn't be messed with.

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250813081716.2181843-2-uwu@icenowy.me
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>