Fix undeclared symbol warnings from sparse

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5539 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/sparc-dis.c b/sparc-dis.c
index dea6b11..7e30460 100644
--- a/sparc-dis.c
+++ b/sparc-dis.c
@@ -2181,7 +2181,7 @@
 
 /* Return the name for membar value VALUE or NULL if not found.  */
 
-const char *
+static const char *
 sparc_decode_membar (value)
      int value;
 {
@@ -2203,7 +2203,7 @@
 
 /* Return the name for prefetch value VALUE or NULL if not found.  */
 
-const char *
+static const char *
 sparc_decode_prefetch (value)
      int value;
 {
@@ -2226,7 +2226,7 @@
 
 /* Return the name for sparclet cpreg value VALUE or NULL if not found.  */
 
-const char *
+static const char *
 sparc_decode_sparclet_cpreg (value)
      int value;
 {