fix typos 'comamnd' -> 'command' in comments

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
diff --git a/arch/ia64/include/asm/perfmon.h b/arch/ia64/include/asm/perfmon.h
index 7f3333d..d551183 100644
--- a/arch/ia64/include/asm/perfmon.h
+++ b/arch/ia64/include/asm/perfmon.h
@@ -7,7 +7,7 @@
 #define _ASM_IA64_PERFMON_H
 
 /*
- * perfmon comamnds supported on all CPU models
+ * perfmon commands supported on all CPU models
  */
 #define PFM_WRITE_PMCS		0x01
 #define PFM_WRITE_PMDS		0x02