drm/msm: display changes for 6.10

Core:

• Switched to generating register header files during build process instead of shipping pre-generated headers
• Merged DPU and MDP4 format databases.

DP:

• Stop using compat string to distinguish DP and eDP cases
• Added support for X Elite platform (X1E80100)
• Reworked DP aux/audio support
• Added SM6350 DP to the bindings (no driver changes, using SM8350 as a fallback compat)

Small misc fixes