ppc: m68k: Move i2c1_clk, i2c2_clk to arch_global_data

Move these fields into arch_global_data and tidy up. This is needed for
both ppc and m68k since they share the i2c driver.

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 d924673..b710f25 100644
--- a/arch/powerpc/include/asm/global_data.h
+++ b/arch/powerpc/include/asm/global_data.h
@@ -80,6 +80,11 @@
 	u32 lbc_clk;
 	void *cpu;
 #endif /* CONFIG_MPC85xx || CONFIG_MPC86xx */
+#if defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) || \
+		defined(CONFIG_MPC86xx)
+	u32 i2c1_clk;
+	u32 i2c2_clk;
+#endif
 };
 
 /*
@@ -102,10 +107,6 @@
 #if defined(CONFIG_FSL_ESDHC)
 	u32 sdhc_clk;
 #endif
-#if defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
-	u32 i2c1_clk;
-	u32 i2c2_clk;
-#endif
 #if defined(CONFIG_QE)
 	u32 qe_clk;
 	uint mp_alloc_base;