drm/radeon/ni_dpm: Clean up errors in ni_dpm.c

Fix the following errors reported by checkpatch:

ERROR: open brace '{' following struct go on the same line
Signed-off-by: GuoHua Chen <chenguohua_716@163.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/ni_dpm.h

@@ -59,8 +59,7 @@ struct ni_mc_reg_table {
 
 #define NISLANDS_MCREGISTERTABLE_FIRST_DRIVERSTATE_SLOT 2
 
-enum ni_dc_cac_level
-{
+enum ni_dc_cac_level {
 	NISLANDS_DCCAC_LEVEL_0 = 0,
 	NISLANDS_DCCAC_LEVEL_1,
 	NISLANDS_DCCAC_LEVEL_2,
@@ -72,8 +71,7 @@ enum ni_dc_cac_level
 	NISLANDS_DCCAC_MAX_LEVELS
 };
 
-struct ni_leakage_coeffients
-{
+struct ni_leakage_coeffients {
 	u32 at;
 	u32 bt;
 	u32 av;
@@ -83,8 +81,7 @@ struct ni_leakage_coeffients
 	u32 t_ref;
 };
 
-struct ni_cac_data
-{
+struct ni_cac_data {
 	struct ni_leakage_coeffients leakage_coefficients;
 	u32 i_leakage;
 	s32 leakage_minimum_temperature;
@@ -100,8 +97,7 @@ struct ni_cac_data
 	u8 lts_truncate_n;
 };
 
-struct ni_cac_weights
-{
+struct ni_cac_weights {
 	u32 weight_tcp_sig0;
 	u32 weight_tcp_sig1;
 	u32 weight_ta_sig;