drm/amdkfd: fix function scopes

 This turns previously global functions into static, thus removing
 compile-time warnings such as:

 warning: no previous prototype for 'pm_set_resources_vi' [-Wmissing-prototypes]
 113 | int pm_set_resources_vi(struct packet_manager *pm, uint32_t *buffer,
     |     ^~~~~~~~~~~~~~~~~~~
Signed-off-by: Isabella Basso <isabbasso@riseup.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -110,8 +110,8 @@ static int pm_runlist_vi(struct packet_manager *pm, uint32_t *buffer,
 	return 0;
 }
 
-int pm_set_resources_vi(struct packet_manager *pm, uint32_t *buffer,
-				struct scheduling_resources *res)
+static int pm_set_resources_vi(struct packet_manager *pm, uint32_t *buffer,
+			       struct scheduling_resources *res)
 {
 	struct pm4_mes_set_resources *packet;