ppc: Move mpc8220 clocks to arch_global_data

Move these fields into arch_global_data and tidy up. The bExtUart field
does not appear to be used, so punt it.

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 fa5c504..656117b 100644
--- a/arch/powerpc/include/asm/global_data.h
+++ b/arch/powerpc/include/asm/global_data.h
@@ -101,6 +101,12 @@
 	u32 ips_clk;
 	u32 csb_clk;
 #endif /* CONFIG_MPC512X */
+#if defined(CONFIG_MPC8220)
+	unsigned long inp_clk;
+	unsigned long vco_clk;
+	unsigned long pev_clk;
+	unsigned long flb_clk;
+#endif
 };
 
 /*
@@ -123,13 +129,6 @@
 #if defined(CONFIG_FSL_ESDHC)
 	u32 sdhc_clk;
 #endif
-#if defined(CONFIG_MPC8220)
-	unsigned long   bExtUart;
-	unsigned long   inp_clk;
-	unsigned long   vco_clk;
-	unsigned long   pev_clk;
-	unsigned long   flb_clk;
-#endif
 	phys_size_t	ram_size;	/* RAM size */
 	unsigned long	reset_status;	/* reset status register at boot	*/
 #if defined(CONFIG_MPC83xx)