esp8266/scripts: Move all of initial setup to inisetup module.

esp8266/scripts/_boot.py

@@ -7,8 +7,4 @@ try:
         vfs = uos.VfsFat(bdev, "")
 except OSError:
     import inisetup
-    inisetup.check_bootsec()
-    print("Performing initial setup")
-    uos.VfsFat.mkfs(bdev)
-    vfs = uos.VfsFat(bdev, "")
-    inisetup.wifi()
+    vfs = inisetup.setup()

esp8266/scripts/inisetup.py

@@ -30,3 +30,11 @@ factory reprogramming of MicroPython firmware (completely erase flash, followed
 by firmware programming).
 """)
         time.sleep(3)
+
+def setup():
+    check_bootsec()
+    print("Performing initial setup")
+    wifi()
+    uos.VfsFat.mkfs(bdev)
+    vfs = uos.VfsFat(bdev, "")
+    return vfs