hw_rev: Wait for 5s b4 gpio init instead of 1.5s

- See Issue #32

src/device/hw_rev.rs

@@ -29,7 +29,7 @@ impl HWRev {
     ///     See Issue #32 on Kirdy Hw Repo
     pub fn startup_delay_before_gpio_init(&mut self){
         if self.major == 0 && self.minor == 3 {
-            sleep(1500);
+            sleep(5000);
         }
     }
 }