drm/msm: include linux/sched/task.h

commit 70082a52f96a45650dfc3d8cdcd2c42bdac9f6f0 upstream.

Without this header file, compile-testing may run into a missing
declaration:

drivers/gpu/drm/msm/msm_gpu.c:444:4: error: implicit declaration of function 'put_task_struct' [-Werror,-Wimplicit-function-declaration]

Fixes: 482f96324a4e ("drm/msm: Fix task dump in gpu recovery")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 52a2146..5e6c78e 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -25,6 +25,7 @@
 #include <linux/pm_opp.h>
 #include <linux/devfreq.h>
 #include <linux/devcoredump.h>
+#include <linux/sched/task.h>
 
 /*
  * Power Management: