server: include 32/64-bit in probe

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/server.h b/server.h
index 49f02a6..46555ce 100644
--- a/server.h
+++ b/server.h
@@ -74,6 +74,7 @@
 	uint8_t fio_patch;
 	uint8_t os;
 	uint8_t arch;
+	uint8_t bpp;
 };
 
 struct cmd_single_line_pdu {