drm/amdgpu: rename tonga_smumgr.h to tonga_smum.h

BugLink: http://bugs.launchpad.net/bugs/1546572

This conflicts with the tonga_smumgr.h from powerplay
in DKMS environement
Signed-off-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jordan Lazare <Jordan.Lazare@amd.com>
(cherry picked from commit dbd29f0d)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

drivers/gpu/drm/amd/amdgpu/tonga_dpm.c

@@ -24,7 +24,7 @@
 #include <linux/firmware.h>
 #include "drmP.h"
 #include "amdgpu.h"
-#include "tonga_smumgr.h"
+#include "tonga_smum.h"
 
 MODULE_FIRMWARE("amdgpu/tonga_smc.bin");
 

drivers/gpu/drm/amd/amdgpu/tonga_smc.c

@@ -25,7 +25,7 @@
 #include "drmP.h"
 #include "amdgpu.h"
 #include "tonga_ppsmc.h"
-#include "tonga_smumgr.h"
+#include "tonga_smum.h"
 #include "smu_ucode_xfer_vi.h"
 #include "amdgpu_ucode.h"