Fix microblaze port WRT fallthru

[Jeff Law]

Just tweaking a fallthru comment.  Installing on the trunk.

Jeff

commit b357502f77b0f6fbc79e216479bee47eab1741a8
Author: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Wed Oct 26 15:52:41 2016 +0000

        * config/microblaze/microblaze.c (microblaze_function_arg): Adjust
        fallthru comment.
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@241568 
138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2076d69..f4a4be0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 2016-10-26  Jeff Law  <l...@redhat.com>
 
+       * config/microblaze/microblaze.c (microblaze_function_arg): Adjust
+       fallthru comment.
+
        * config/msp430/msp430.c (msp430_legitimate_address_p): Adjust
        fallthru comment.
 
diff --git a/gcc/config/microblaze/microblaze.c 
b/gcc/config/microblaze/microblaze.c
index 0fb273f..4b7a9ba 100644
--- a/gcc/config/microblaze/microblaze.c
+++ b/gcc/config/microblaze/microblaze.c
@@ -1553,7 +1553,7 @@ microblaze_function_arg (cumulative_args_t cum_v, 
machine_mode mode,
     default:
       gcc_assert (GET_MODE_CLASS (mode) == MODE_COMPLEX_INT
          || GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT);
-      /* Drops through.  */
+      /* FALLTHRU */
     case BLKmode:
       regbase = GP_ARG_FIRST;
       break;