ARM: PNX4008: remove platform definitions from mach/timex.h

mach/timex.h is only supposed to contain a definition for
CLOCK_TICK_RATE.  Remove additional includes, and move private
definitions to a private header file.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pnx4008/time.c b/arch/arm/mach-pnx4008/time.c
index fc0ba18..0c8aad4 100644
--- a/arch/arm/mach-pnx4008/time.c
+++ b/arch/arm/mach-pnx4008/time.c
@@ -30,6 +30,8 @@
 #include <asm/mach/time.h>
 #include <asm/errno.h>
 
+#include "time.h"
+
 /*! Note: all timers are UPCOUNTING */
 
 /*!