powerpc: rename powermac files to remove pmac_ prefix

Since the files are now in arch/powerpc/platforms/powermac, the
pmac_ prefix that they had is redundant.

Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --cc arch/powerpc/platforms/powermac/Makefile
Simple merge

diff --cc arch/powerpc/platforms/powermac/backlight.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/cache.S
Simple merge

diff --cc arch/powerpc/platforms/powermac/cpufreq.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/feature.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/low_i2c.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/nvram.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/pci.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/pic.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/pic.h
Simple merge

diff --cc arch/powerpc/platforms/powermac/setup.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/sleep.S
Simple merge

diff --cc arch/powerpc/platforms/powermac/smp.c
Simple merge

diff --cc arch/powerpc/platforms/powermac/time.c
Simple merge