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/mcf5227x/speed.c b/arch/m68k/cpu/mcf5227x/speed.c
index c1d5930..98f554a 100644
--- a/arch/m68k/cpu/mcf5227x/speed.c
+++ b/arch/m68k/cpu/mcf5227x/speed.c
@@ -114,24 +114,24 @@
 			    ((in_be32(&pll->pcr) & 0xFF000000) >> 24) *
 			    CONFIG_SYS_INPUT_CLKSRC;
 		}
-		gd->vco_clk = vco;	/* Vco clock */
+		gd->arch.vco_clk = vco;	/* Vco clock */
 	} else if (bootmode == 3) {
 		/* serial mode */
 		vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
-		gd->vco_clk = vco;	/* Vco clock */
+		gd->arch.vco_clk = vco;	/* Vco clock */
 	}
 
 	if ((in_be16(&ccm->ccr) & CCM_MISCCR_LIMP) == CCM_MISCCR_LIMP) {
 		/* Limp mode */
 	} else {
-		gd->inp_clk = CONFIG_SYS_INPUT_CLKSRC;	/* Input clock */
+		gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */
 
 		temp = (in_be32(&pll->pcr) & PLL_PCR_OUTDIV1_MASK) + 1;
 		gd->cpu_clk = vco / temp;	/* cpu clock */
 
 		temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
-		gd->flb_clk = vco / temp;	/* flexbus clock */
-		gd->bus_clk = gd->flb_clk;
+		gd->arch.flb_clk = vco / temp;	/* flexbus clock */
+		gd->bus_clk = gd->arch.flb_clk;
 	}
 
 #ifdef CONFIG_FSL_I2C