drm/amdgpu: Change page/record number calculation based on nps

save only one record to save eeprom space,and
bad_page_num = pa_rec_num + mca_rec_num*16

Signed-off-by: ganglxie <ganglxie@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>