[Blackfin] arch: Spelling fixes

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

diff --git a/arch/blackfin/mach-bf548/ints-priority.c b/arch/blackfin/mach-bf548/ints-priority.c
index 05e3b3c..2665653 100644
--- a/arch/blackfin/mach-bf548/ints-priority.c
+++ b/arch/blackfin/mach-bf548/ints-priority.c
@@ -4,7 +4,7 @@
  * Author:       Michael Hennerich
  *
  * Created:
- * Description:  Set up the interupt priorities
+ * Description:  Set up the interrupt priorities
  *
  * Modified:
  *               Copyright 2004-2006 Analog Devices Inc.