newlib: Update licence

- libgloss:
  - (22) New tcl license for csky-* targets
  - (23) New license for csky-* targets, states itself as FreeBSD license
  but text matches GPL (648365e0)
  - (24) New BSD-2 license for risc-v targets

newlib:
  - New license for csky-* targets, states itself as FreeBSD license
  but text matches GPL (648365e0)
  - (53) arm targets FreeBSD
  - (54) arm targets BSD-2-Clause-FreeBSD

Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandro@enedino.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>