configure: fixup __sync_fetch_and_add()

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/configure b/configure
index 1a75fa4..d1f277d 100755
--- a/configure
+++ b/configure
@@ -446,7 +446,7 @@
 cat > $TMPC << EOF
 static int sfaa(int *ptr)
 {
-  return __sync_fetch_and_and(ptr, 0);
+  return __sync_fetch_and_add(ptr, 0);
 }
 
 int main(int argc, char **argv)
@@ -459,7 +459,7 @@
 if compile_prog "" "" "__sync_fetch_and_add()" ; then
     sfaa="yes"
 fi
-echo "__sync_fetch_and add          $sfaa"
+echo "__sync_fetch_and_add          $sfaa"
 
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 # libverbs probe