powerpc: Remove stale function prototypes

There were a number of prototypes for functions that no longer
exist. Remove them.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --cc arch/powerpc/include/asm/bug.h
Simple merge

diff --cc arch/powerpc/include/asm/hydra.h
Simple merge

diff --cc arch/powerpc/include/asm/irq.h
Simple merge

diff --cc arch/powerpc/include/asm/kexec.h
Simple merge

diff --cc arch/powerpc/include/asm/page_64.h
Simple merge

diff --cc arch/powerpc/include/asm/pgtable-ppc32.h
Simple merge

diff --cc arch/powerpc/include/asm/prom.h
Simple merge

diff --cc arch/powerpc/include/asm/rio.h
Simple merge

diff --cc arch/powerpc/include/asm/tsi108.h
Simple merge

diff --cc arch/powerpc/include/asm/udbg.h
Simple merge

diff --cc arch/powerpc/platforms/pseries/lpar.c
Simple merge