RFC: powerpc-multilibs: remove -mcpu=601 and -Dmpc8260 multilibs

[Ralf Corsepius]

Hi,

When looking into Sebastian's proposal to change the powerpc 
multilibs[1], I believe to have identified the

* -mcpu=601 [2]
and
* -Dmpc8260 [3]

multilibs as unused.

Am I missing something or does this apply? The latter would mean these 
multilibs can be removed.


Ralf

[1] https://www.rtems.org/bugzilla/show_bug.cgi?id=1740

[2] No make/custom/* uses it:
# grep 601 rtems/c/src/lib/libbsp/powerpc/*/make/custom/*

[3] The -Dmpc8260 multilib is an RTEMS proprietaty multilib.
I.e. this multilib only makes sense if it is being used in newlib or cpukit:
# grep -R mpc8260 newlib-1.19.0/newlib
# grep -R mpc8260 rtems/cpukit