[ARM] pxa: separate out power manager and clock registers

The power manager and core clock registers aren't present in PXA3
CPUs.  Move them out of pxa-regs.h into pxa2xx-regs.h, and include
pxa2xx-regs.h where necessary.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/clock.c b/arch/arm/mach-pxa/clock.c
index e97dc59..180c8bb 100644
--- a/arch/arm/mach-pxa/clock.c
+++ b/arch/arm/mach-pxa/clock.c
@@ -12,7 +12,7 @@
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 
-#include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
 #include <asm/arch/pxa2xx-gpio.h>
 #include <asm/hardware.h>