Cleanup: fix "MHz" spelling

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/siemens/IAD210/IAD210.c b/board/siemens/IAD210/IAD210.c
index e9e7f84..e21bb24 100644
--- a/board/siemens/IAD210/IAD210.c
+++ b/board/siemens/IAD210/IAD210.c
@@ -240,7 +240,7 @@
 	iop->iop_padir = 0x0800;
 
 	/* start timer 2 for the 4hz LED blink rate */
-	timers->cpmt_tmr2 = 0xff2c;	/* 4hz for 64mhz */
+	timers->cpmt_tmr2 = 0xff2c;	/* 4HZ for 64MHz */
 	timers->cpmt_trr2 = 0x000003d0;	/* clk/16 , prescale=256 */
 	timers->cpmt_tgcr = 0x00000810;	/* run timer 2 */
 
diff --git a/board/siemens/IAD210/atm.c b/board/siemens/IAD210/atm.c
index d1b75bc..e599c10 100644
--- a/board/siemens/IAD210/atm.c
+++ b/board/siemens/IAD210/atm.c
@@ -579,7 +579,7 @@
   /*                    11 = divide by 7                             */
   /*                                                                 */
   /* Note that the UTOPIA clock must be programmed as to operate     */
-  /* within the range SYSCLK/10 .. 50Mhz.                            */
+  /* within the range SYSCLK/10 .. 50MHz.                            */
   /*-----------------------------------------------------------------*/
   car->car_sccr &= 0xFFFFFFE0;
   car->car_sccr |= 0x00000008; /* UTPCLK = SYSCLK / 4 */