m68k: Move CONFIG_EXTRA_CLOCK to arch_global_data

Move inp_clk, vco_clk and flb_clk into arch_global_data and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/m68k/cpu/mcf5445x/cpu.c b/arch/m68k/cpu/mcf5445x/cpu.c
index b612cda..08930f4 100644
--- a/arch/m68k/cpu/mcf5445x/cpu.c
+++ b/arch/m68k/cpu/mcf5445x/cpu.c
@@ -101,16 +101,16 @@
 		printf("       CPU CLK %s MHz BUS CLK %s MHz FLB CLK %s MHz\n",
 		       strmhz(buf1, gd->cpu_clk),
 		       strmhz(buf2, gd->bus_clk),
-		       strmhz(buf3, gd->flb_clk));
+		       strmhz(buf3, gd->arch.flb_clk));
 #ifdef CONFIG_PCI
 		printf("       PCI CLK %s MHz INP CLK %s MHz VCO CLK %s MHz\n",
 		       strmhz(buf1, gd->pci_clk),
-		       strmhz(buf2, gd->inp_clk),
-		       strmhz(buf3, gd->vco_clk));
+		       strmhz(buf2, gd->arch.inp_clk),
+		       strmhz(buf3, gd->arch.vco_clk));
 #else
 		printf("       INP CLK %s MHz VCO CLK %s MHz\n",
-		       strmhz(buf1, gd->inp_clk),
-		       strmhz(buf2, gd->vco_clk));
+		       strmhz(buf1, gd->arch.inp_clk),
+		       strmhz(buf2, gd->arch.vco_clk));
 #endif
 	}