[PATCH] drm/dp_mst :fix gcc compile error

[Chen Wandun]

From: Chenwandun <chenwandun at huawei.com>

drivers/gpu/drm/drm_dp_mst_topology.c: In function __topology_ref_save:
drivers/gpu/drm/drm_dp_mst_topology.c:1424:6: error: implicit declaration of function stack_trace_save; did you mean stack_depot_save? [-Werror=implicit-function-declaration]
  n = stack_trace_save(stack_entries, ARRAY_SIZE(stack_entries), 1);
      ^~~~~~~~~~~~~~~~
      stack_depot_save
drivers/gpu/drm/drm_dp_mst_topology.c: In function __dump_topology_ref_history:
drivers/gpu/drm/drm_dp_mst_topology.c:1513:3: error: implicit declaration of function stack_trace_snprint; did you mean acpi_trace_point? [-Werror=implicit-function-declaration]
   stack_trace_snprint(buf, PAGE_SIZE, entries, nr_entries, 4);
   ^~~~~~~~~~~~~~~~~~~
   acpi_trace_point

stack_trace_save and stack_trace_snprint are declared in <linux/stacktrace.h>,
so there is need to include it, and <linux/stackdepot.h> is already included
by practices, so just replace <linux/stackdepot.h> by <linux/stacktrace.h>.

Signed-off-by: Chenwandun <chenwandun at huawei.com>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 85bef73..11adc4b 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -29,7 +29,7 @@
 #include <linux/seq_file.h>
 
 #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
-#include <linux/stackdepot.h>
+#include <linux/stacktrace.h>
 #include <linux/sort.h>
 #include <linux/timekeeping.h>
 #include <linux/math64.h>
-- 
2.7.4