ac/surface: limit RADEON_SURF_NO_TEXTURE to color surfaces

ac/surface: limit RADEON_SURF_NO_TEXTURE to color surfaces

For z surfaces, flags.texture should be based on
RADEON_SURF_TC_COMPATIBLE_HTILE alone.  Otherwise, addrlib could pick a
_X/_T swizzle mode for a MSAA depth texture, which is said to be broken:

  When _X/_T swizzle mode was used for MSAA depth texture, TC will get zplane
  equation from wrong address within memory range a tile covered and use the
  garbage data for compressed Z reading which finally leads to corruption.

Fixes: de0885cdb89 ("amd/surface: add RADEON_SURF_NO_TEXTURE flag")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24767>