Cleanup: fix "MHz" spelling

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/cpu/mpc8220/i2cCore.c b/cpu/mpc8220/i2cCore.c
index accf43c..b89ad03 100644
--- a/cpu/mpc8220/i2cCore.c
+++ b/cpu/mpc8220/i2cCore.c
@@ -440,7 +440,7 @@
 	return OK;
 }
 
-/* FDR table base on 33Mhz - more detail please refer to Odini2c_dividers.xls
+/* FDR table base on 33MHz - more detail please refer to Odini2c_dividers.xls
 FDR FDR scl sda scl2tap2
 510 432 tap tap tap tap scl_per	    sda_hold	I2C Freq    0	1   2	3   4	5
 000 000 9   3	4   1	28 Clocks   9 Clocks	1190 KHz    0	0   0	0   0	0