[POWERPC] Rename cpu_setup_power4.S to cpu_setup_ppc970.S

Rename cpu_setup_power4.S to cpu_setup_ppc970.S, since that's
really what it is.

No functional or other changes.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 814f242..bcf5003 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -16,7 +16,7 @@
 obj-y				+= vdso32/
 obj-$(CONFIG_PPC64)		+= setup_64.o binfmt_elf32.o sys_ppc32.o \
 				   signal_64.o ptrace32.o \
-				   paca.o cpu_setup_power4.o \
+				   paca.o cpu_setup_ppc970.o \
 				   firmware.o sysfs.o
 obj-$(CONFIG_PPC64)		+= vdso64/
 obj-$(CONFIG_ALTIVEC)		+= vecemu.o vector.o
diff --git a/arch/powerpc/kernel/cpu_setup_power4.S b/arch/powerpc/kernel/cpu_setup_ppc970.S
similarity index 100%
rename from arch/powerpc/kernel/cpu_setup_power4.S
rename to arch/powerpc/kernel/cpu_setup_ppc970.S