drm/amd/powerplay: fix byte alignment issue of smu11 pptable

The smu_11_0_powerplay_table, smu_11_0_power_saving_clock_table, and
smu_11_0_overdrive_table need byte alignment. So we must add packed attribute
in the definitions.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/inc/smu_v11_0_pptable.h

@@ -91,7 +91,7 @@ struct smu_11_0_overdrive_table
     uint8_t  cap[SMU_11_0_MAX_ODFEATURE];                     //OD feature support flags
     uint32_t max[SMU_11_0_MAX_ODSETTING];                     //default maximum settings
     uint32_t min[SMU_11_0_MAX_ODSETTING];                     //default minimum settings
-};
+} __attribute__((packed));
 
 enum SMU_11_0_PPCLOCK_ID {
     SMU_11_0_PPCLOCK_GFXCLK = 0,
@@ -115,7 +115,7 @@ struct smu_11_0_power_saving_clock_table
     uint32_t count;                                           //power_saving_clock_count = SMU_11_0_PPCLOCK_COUNT
     uint32_t max[SMU_11_0_MAX_PPCLOCK];                       //PowerSavingClock Mode Clock Maximum array In MHz
     uint32_t min[SMU_11_0_MAX_PPCLOCK];                       //PowerSavingClock Mode Clock Minimum array In MHz
-};
+} __attribute__((packed));
 
 struct smu_11_0_powerplay_table
 {
@@ -142,6 +142,6 @@ struct smu_11_0_powerplay_table
       struct smu_11_0_overdrive_table               overdrive_table;
 
       PPTable_t smc_pptable;                        //PPTable_t in smu11_driver_if.h
-};
+} __attribute__((packed));
 
 #endif