library: System Information: use RestOctets where possible

The 'RestOctets' is a sub-type of the 'octetstring' with additional
padding attributes. Let's use it for SI2bis, SI2ter, and SI6 too.

Change-Id: I183d3ba9000e3ced8ecce74a4390b80075ddf25d
Signed-off-by: Vadim Yanitskiy <axilirator@gmail.com>
1 file changed