powerpc/64: Free up CPU_FTR_ICSWX

The last user of CPU_FTR_ICSWX was removed in commit
6ff4d3e96652 ("powerpc: Remove old unused icswx based coprocessor
support"), so free the bit up for future use.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2 files changed