spelling fixes: arch/alpha/

Spelling fixes in arch/alpha/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/arch/alpha/kernel/err_marvel.c b/arch/alpha/kernel/err_marvel.c
index f2956ac..497877b 100644
--- a/arch/alpha/kernel/err_marvel.c
+++ b/arch/alpha/kernel/err_marvel.c
@@ -1082,7 +1082,7 @@
 	}	
 
 	/*
-	 * A system event or error has occured, handle it here.
+	 * A system event or error has occurred, handle it here.
 	 *
 	 * Any errors in the logout frame have already been cleared by the
 	 * PALcode, so just parse it.