i8253: Consolidate all kernel definitions of i8253_lock

Move them to drivers/clocksource/i8253.c and remove the
implementations in arch/

[ tglx: Avoid the extra file in lib - folded arch patches in. The
  export will become conditional in a later step ]

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Link: http://lkml.kernel.org/r/20110601180610.221426078@duck.linux-mips.net
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 96c92191..330343b 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -1,5 +1,11 @@
 config CLKSRC_I8253
 	bool
 
+config I8253_LOCK
+	bool
+
+config CLKBLD_I8253
+	def_bool y if CLKSRC_I8253 || I8253_LOCK
+
 config CLKSRC_MMIO
 	bool