[MIPS] Unify around a consistent *_ntop/*_pton style.

Unifying around the <class>_ntop() style;
changing ntop_*() and pton_* to *_ntop() and *_pton().

Also added portable versions of strerror() and strerror_r()
while updating the errno.c file.

Change-Id: I2a0f40963f293ef9387b0dbcb3426276d301a17c
Signed-off-by: Pete Delaney <piet.delaney@imgtec.com>
Signed-off-by: Chris Dearman <chris.dearman@imgtec.com>
Signed-off-by: Paul Lind <paul.lind@imgtec.com>
8 files changed