drm/amdkfd: Use proper enum in pm_unmap_queues_v9()

Clang warns:

drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_packet_manager_v9.c:267:3:
error: implicit conversion from enumeration type 'enum
mes_map_queues_extended_engine_sel_enum' to different enumeration type
'enum mes_unmap_queues_extended_engine_sel_enum'
[-Werror,-Wenum-conversion]
extended_engine_sel__mes_map_queues__sdma0_to_7_sel :
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

Use 'extended_engine_sel__mes_unmap_queues__sdma0_to_7_sel' to eliminate
the warning, which is the same numeric value of the proper type.

Fixes: 009e9a158505 ("drm/amdkfd: navi2x requires extended engines to map and unmap sdma queues")
Link: https://github.com/ClangBuiltLinux/linux/issues/1596
Signed-off-by: Nathan Chancellor <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c

···
 					sizeof(struct pm4_mes_unmap_queues));
 
 	packet->bitfields2.extended_engine_sel = pm_use_ext_eng(pm->dqm->dev) ?
-		extended_engine_sel__mes_map_queues__sdma0_to_7_sel :
+		extended_engine_sel__mes_unmap_queues__sdma0_to_7_sel :
 		extended_engine_sel__mes_unmap_queues__legacy_engine_sel;
 
 	packet->bitfields2.engine_sel =