drm/amd/display: clean up one inconsistent indenting

drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn35/dcn35_fpu.c:260 dcn35_update_bw_bounding_box_fpu() warn: inconsistent indenting

Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>