powerpc/5xxx: Add common mpc5xxx_get_bus_frequency() function

So far, MPC512x used mpc512x_find_ips_freq() to get the bus frequency,
while MPC52xx used mpc52xx_find_ipb_freq().  Despite the different
clock names (IPS vs. IPB) the code was identical.

Use common code for both processor families.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/arch/powerpc/include/asm/mpc52xx.h b/arch/powerpc/include/asm/mpc52xx.h
index 52e049c..1b4f697 100644
--- a/arch/powerpc/include/asm/mpc52xx.h
+++ b/arch/powerpc/include/asm/mpc52xx.h
@@ -16,6 +16,7 @@
 #ifndef __ASSEMBLY__
 #include <asm/types.h>
 #include <asm/prom.h>
+#include <asm/mpc5xxx.h>
 #endif /* __ASSEMBLY__ */
 
 #include <linux/suspend.h>
@@ -268,7 +269,6 @@
 #ifndef __ASSEMBLY__
 
 /* mpc52xx_common.c */
-extern unsigned int mpc52xx_find_ipb_freq(struct device_node *node);
 extern void mpc5200_setup_xlb_arbiter(void);
 extern void mpc52xx_declare_of_platform_devices(void);
 extern void mpc52xx_map_common_devices(void);
diff --git a/arch/powerpc/include/asm/mpc512x.h b/arch/powerpc/include/asm/mpc5xxx.h
similarity index 65%
rename from arch/powerpc/include/asm/mpc512x.h
rename to arch/powerpc/include/asm/mpc5xxx.h
index c48a165..5ce9c5f 100644
--- a/arch/powerpc/include/asm/mpc512x.h
+++ b/arch/powerpc/include/asm/mpc5xxx.h
@@ -4,7 +4,7 @@
  * Author: John Rigby, <jrigby@freescale.com>, Friday Apr 13 2007
  *
  * Description:
- * MPC5121 Prototypes and definitions
+ * MPC5xxx Prototypes and definitions
  *
  * This is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by
@@ -13,10 +13,10 @@
  *
  */
 
-#ifndef __ASM_POWERPC_MPC512x_H__
-#define __ASM_POWERPC_MPC512x_H__
+#ifndef __ASM_POWERPC_MPC5xxx_H__
+#define __ASM_POWERPC_MPC5xxx_H__
 
-extern unsigned long mpc512x_find_ips_freq(struct device_node *node);
+extern unsigned long mpc5xxx_get_bus_frequency(struct device_node *node);
 
-#endif /* __ASM_POWERPC_MPC512x_H__ */
+#endif /* __ASM_POWERPC_MPC5xxx_H__ */