mpc8568: Double local bus clock divider

The clock divider for the MPC8568 local bus should be doubled, like the
other newer MPC85xx chips.

Since there are now more chips with a 2x divider than a 1x, and any new
85xx chips will probably be 2x, invert the sense of the #if so that it
lists the 1x chips instead of the 2x ones.

Signed-off-by: Trent Piepho <tpiepho@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Jon Loeliger <jdl@freescale.com>

cpu/mpc85xx/cpu.c

@@ -176,8 +176,8 @@ int checkcpu (void)
 #endif
 	clkdiv = lcrr & LCRR_CLKDIV;
 	if (clkdiv == 2 || clkdiv == 4 || clkdiv == 8) {
-#if defined(CONFIG_MPC8548) || defined(CONFIG_MPC8544) || \
-    defined(CONFIG_MPC8572) || defined(CONFIG_MPC8536)
+#if !defined(CONFIG_MPC8540) && !defined(CONFIG_MPC8541) && \
+    !defined(CONFIG_MPC8555) && !defined(CONFIG_MPC8560)
 		/*
 		 * Yes, the entire PQ38 family use the same
 		 * bit-representation for twice the clock divider values.