[Why&How]
To refactor DM IRQ management, all fields used by IRQ is best moved
to a separate struct so that main amdgpu_crtc struct need not be changed
Location of the new struct shall be in DM
Reviewed-by: NNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: NAurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>