[ARM] Fix arch-realview/system.h to use __io_address()

Move __io_address to arch-realview/hardware.h, drop core.h from platsmp.c
and localtimer.c, and include asm/io.h where required.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/arch-realview/system.h b/include/asm-arm/arch-realview/system.h
index 9f8fcbc..6f3d0ce 100644
--- a/include/asm-arm/arch-realview/system.h
+++ b/include/asm-arm/arch-realview/system.h
@@ -36,7 +36,7 @@
 
 static inline void arch_reset(char mode)
 {
-	unsigned int hdr_ctrl =	(IO_ADDRESS(REALVIEW_SYS_BASE) + REALVIEW_SYS_RESETCTL_OFFSET);
+	void __iomem *hdr_ctrl = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_RESETCTL_OFFSET;
 	unsigned int val;
 
 	/*