This is the last unification step. Here we do remove one of the files
and rename the left one as cpu.c, as both are now the same.
Also update power/Makefile, telling it to build cpu.o, instead of
cpu_(32|64).o
Signed-off-by: NSergio Luis <sergio@larces.uece.br>
Signed-off-by: NLauro Salmito <laurosalmito@gmail.com>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>