drm/amd/pm: Fix smu v13.0.6 caps initialization

Fix the initialization and usage of SMU v13.0.6 capability values. Use
caps_set/clear functions to set/clear capability.

Also, fix SET_UCLK_MAX capability on APUs, it is supported on APUs.

Fixes: e9b86b8 ("drm/amd/pm: Add capability flags for SMU v13.0.6")
Signed-off-by: Lijo Lazar <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Reviewed-by: Yang Wang <[email protected]>
Reviewed-by: Asad Kamal <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Lijo Lazar