Cleanup: fix "MHz" spelling

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/sbc8560/sbc8560.c b/board/sbc8560/sbc8560.c
index f01f87e..3d4008b 100644
--- a/board/sbc8560/sbc8560.c
+++ b/board/sbc8560/sbc8560.c
@@ -297,7 +297,7 @@
 #if 0
 #if !defined(CONFIG_RAM_AS_FLASH) /* LocalBus SDRAM is not emulating flash */
 	get_sys_info(&sysinfo);
-	/* if localbus freq is less than 66Mhz,we use bypass mode,otherwise use DLL */
+	/* if localbus freq is less than 66MHz,we use bypass mode,otherwise use DLL */
 	if(sysinfo.freqSystemBus/(CONFIG_SYS_LBC_LCRR & 0x0f) < 66000000) {
 		lbc->lcrr = (CONFIG_SYS_LBC_LCRR & 0x0fffffff)| 0x80000000;
 	} else {