ppc: Move mpc512x clocks to arch_global_data

Move ips_clk and csb_clk into arch_global_data and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/powerpc/include/asm/global_data.h b/arch/powerpc/include/asm/global_data.h
index 423e792..fa5c504 100644
--- a/arch/powerpc/include/asm/global_data.h
+++ b/arch/powerpc/include/asm/global_data.h
@@ -97,6 +97,10 @@
 #if defined(CONFIG_MPC5xxx)
 	unsigned long ipb_clk;
 #endif
+#if defined(CONFIG_MPC512X)
+	u32 ips_clk;
+	u32 csb_clk;
+#endif /* CONFIG_MPC512X */
 };
 
 /*
@@ -119,10 +123,6 @@
 #if defined(CONFIG_FSL_ESDHC)
 	u32 sdhc_clk;
 #endif
-#if defined(CONFIG_MPC512X)
-	u32 ips_clk;
-	u32 csb_clk;
-#endif /* CONFIG_MPC512X */
 #if defined(CONFIG_MPC8220)
 	unsigned long   bExtUart;
 	unsigned long   inp_clk;