intel: universal plane programming + DP MST topology manager
plane_universal.rs: per-plane enable/disable with format+rotation
XRGB8888, ARGB8888, NV12 format support
0/90/180/270 rotation via PLANE_CTL bits
Position, stride, surface address, colorkey programming
dp_mst.rs: Multi-Stream Transport topology management
DPCD MST capability probe (DPCD 0x0021)
Upstream MST enable (DPCD 0x0111)
VCPI allocation/deallocation (payload table + allocate set)
MstBranchDevice tracking for branch device enumeration
mod.rs: registered plane_universal and dp_mst modules
vasilito
b85f07ad22