ARM: sunxi: Make PSCI code sun7i specific

The PSCI code only works for sun7i. Rename it with _sun7i suffix,
and build only if building for sun7i.

This paves the way for adding PSCI support for other platforms.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile
index 7ef6b4c..85fbc85 100644
--- a/arch/arm/cpu/armv7/sunxi/Makefile
+++ b/arch/arm/cpu/armv7/sunxi/Makefile
@@ -35,7 +35,7 @@
 
 ifndef CONFIG_SPL_BUILD
 ifdef CONFIG_ARMV7_PSCI
-obj-y	+= psci.o
+obj-$(CONFIG_MACH_SUN7I)	+= psci_sun7i.o
 endif
 endif
 
diff --git a/arch/arm/cpu/armv7/sunxi/psci.S b/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
similarity index 100%
rename from arch/arm/cpu/armv7/sunxi/psci.S
rename to arch/arm/cpu/armv7/sunxi/psci_sun7i.S