drm/amdgpu: Add soc24 common ip block (v2)

Add initial soc24 support.

v1: Add soc24 common ip block.
v2: Switch to new select_se_sh/enter_safe_mode
    interface.
v3: squash in correct ext rev id, etc. (Alex)

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Likun Gao <Likun.Gao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>