[Why]
There are HW-indpendent functions that enables and disables kcq. These functions use
the kiq_pm4_funcs implementation.

[How]
Local kcq enable and disable functions removed and replace it by the generic kcq
enable under amdgpu_gfx
Signed-off-by: NAlex Sierra <alex.sierra@amd.com>
Acked-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>