drm/amd/pm: Clean up errors in hwmgr.h

Fix the following errors reported by checkpatch:

ERROR: open brace '{' following struct go on the same line
ERROR: Use C99 flexible arrays
Signed-off-by: Ran Sun <sunran001@208suo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h

@@ -190,8 +190,7 @@ struct phm_vce_clock_voltage_dependency_table {
 };
 
 
-enum SMU_ASIC_RESET_MODE
-{
+enum SMU_ASIC_RESET_MODE {
     SMU_ASIC_RESET_MODE_0,
     SMU_ASIC_RESET_MODE_1,
     SMU_ASIC_RESET_MODE_2,
@@ -516,7 +515,7 @@ struct phm_vq_budgeting_record {
 
 struct phm_vq_budgeting_table {
 	uint8_t numEntries;
-	struct phm_vq_budgeting_record entries[1];
+	struct phm_vq_budgeting_record entries[0];
 };
 
 struct phm_clock_and_voltage_limits {
@@ -607,8 +606,7 @@ struct phm_ppt_v2_information {
 	uint8_t  uc_dcef_dpm_voltage_mode;
 };
 
-struct phm_ppt_v3_information
-{
+struct phm_ppt_v3_information {
 	uint8_t uc_thermal_controller_type;
 
 	uint16_t us_small_power_limit1;