Blackfin arch: fix typo pointed out by David Rowe (Mhz -> MHz)

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index dfc464d..abf34a8 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -332,7 +332,7 @@
 		       CPU, bfin_revid());
 	printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
 
-	printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu Mhz System Clock\n",
+	printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
 	       cclk / 1000000,  sclk / 1000000);
 
 	if (ANOMALY_05000273 && (cclk >> 1) <= sclk)