85xx: Fix the wrong SYS_CLK_IN for 8569MDS

The SYS_CLK_IN of MPC8569MDS is 66.66MHz,
The DDR_CLK_IN is same with SYS_CLK_IN in 8569 processor.
so, change the SYS_CLK_IN from 66MHz to 66.66MHz.
Signed-off-by: NDave Liu <daveliu@freescale.com>

include/configs/MPC8569MDS.h

@@ -55,8 +55,8 @@
 extern unsigned long get_clock_freq(void);
 #endif
 /* Replace a call to get_clock_freq (after it is implemented)*/
-#define CONFIG_SYS_CLK_FREQ	66000000
-#define CONFIG_DDR_CLK_FREQ	66000000
+#define CONFIG_SYS_CLK_FREQ	66666666
+#define CONFIG_DDR_CLK_FREQ	CONFIG_SYS_CLK_FREQ
 
 /*
  * These can be toggled for performance analysis, otherwise use default.