Staging: lustre: lnet: selftest: Made a function static.

The following patch makes a function static as it is not used by other
files.
The patch fixes the warning:
WARNING: symbol 'brw_bulk_ready' was not declared. Should it be static?

The above warning was reported by sparse.
Signed-off-by: Heena Sirwani <heenasirwani@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lnet/selftest/brw_test.c

@@ -378,7 +378,7 @@ brw_server_rpc_done(srpc_server_rpc_t *rpc)
 	sfw_free_pages(rpc);
 }
 
-int
+static int
 brw_bulk_ready(srpc_server_rpc_t *rpc, int status)
 {
 	__u64	     magic = BRW_MAGIC;