i8253: Move remaining content and delete asm/i8253.h

Move setup_pit_timer() declaration to the common header file and
remove the arch specific ones.

[ tglx: Move it to linux/i8253.h instead of asm/mips and asm/x86 ]
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-mips@linux-mips.org
Cc: Sergei Shtylyov <sshtylyov@mvista.com
Link: http://lkml.kernel.org/r/20110601180610.913463093@duck.linux-mips.netSigned-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/arm/include/asm/i8253.h

-#ifndef __ASMARM_I8253_H
-#define __ASMARM_I8253_H
-
-#endif

arch/mips/include/asm/i8253.h

-/*
- *  Machine specific IO port address definition for generic.
- *  Written by Osamu Tomita <tomita@cinet.co.jp>
- */
-#ifndef __ASM_I8253_H
-#define __ASM_I8253_H
-
-extern void setup_pit_timer(void);
-
-#endif /* __ASM_I8253_H */

arch/x86/include/asm/i8253.h

-#ifndef _ASM_X86_I8253_H
-#define _ASM_X86_I8253_H
-
-extern void setup_pit_timer(void);
-
-#endif /* _ASM_X86_I8253_H */

include/linux/i8253.h

@@ -12,7 +12,6 @@
 #include <linux/param.h>
 #include <linux/spinlock.h>
 #include <linux/timex.h>
-#include <asm/i8253.h>
 
 /* i8253A PIT registers */
 #define PIT_MODE	0x43
@@ -26,4 +25,6 @@
 
 extern raw_spinlock_t i8253_lock;
 
+extern void setup_pit_timer(void);
+
 #endif /* __LINUX_I8253_H */