ARM: uniphier: fix various sparse warnings

Fix warnings reported by sparse:
 - ... was not declared. Should it be static?"
 - cast to restricted __be32

While fixing those, the type conflict of cci500_init() was found.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/arm64/smp_kick_cpus.c b/arch/arm/mach-uniphier/arm64/smp_kick_cpus.c
index 4f08963..8e5b198 100644
--- a/arch/arm/mach-uniphier/arm64/smp_kick_cpus.c
+++ b/arch/arm/mach-uniphier/arm64/smp_kick_cpus.c
@@ -8,6 +8,8 @@
 #include <linux/io.h>
 #include <linux/sizes.h>
 
+#include "../init.h"
+
 #define UNIPHIER_SMPCTRL_ROM_RSV0	0x59801200
 
 void uniphier_smp_setup(void);