drm/amd/display: Clean up warnings in amdgpu_dm _mst_types, _plane, _psr.c

Fix the following warnings reported by checkpatch:

WARNING: Missing a blank line after declarations
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

@@ -296,6 +296,7 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 
 	if (!aconnector->edid) {
 		struct edid *edid;
+
 		edid = drm_dp_mst_get_edid(connector, &aconnector->mst_root->mst_mgr, aconnector->mst_output_port);
 
 		if (!edid) {

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c

@@ -164,7 +164,7 @@ static bool modifier_has_dcc(uint64_t modifier)
 	return IS_AMD_FMT_MOD(modifier) && AMD_FMT_MOD_GET(DCC, modifier);
 }
 
-static unsigned modifier_gfx9_swizzle_mode(uint64_t modifier)
+static unsigned int modifier_gfx9_swizzle_mode(uint64_t modifier)
 {
 	if (modifier == DRM_FORMAT_MOD_LINEAR)
 		return 0;
@@ -581,7 +581,7 @@ static void add_gfx11_modifiers(struct amdgpu_device *adev,
 	int pkrs = 0;
 	u32 gb_addr_config;
 	u8 i = 0;
-	unsigned swizzle_r_x;
+	unsigned int swizzle_r_x;
 	uint64_t modifier_r_x;
 	uint64_t modifier_dcc_best;
 	uint64_t modifier_dcc_4k;

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c

@@ -166,6 +166,7 @@ bool amdgpu_dm_psr_enable(struct dc_stream_state *stream)
 	 */
 	if (vsync_rate_hz != 0) {
 		unsigned int frame_time_microsec = 1000000 / vsync_rate_hz;
+
 		num_frames_static = (30000 / frame_time_microsec) + 1;
 	}