FROMGIT: usb: gadget: udc: core: Prevent redundant calls to pullup

usb_gadget_connect calls gadget->ops->pullup without checking whether
gadget->connected was previously set. Make this symmetric to
usb_gadget_disconnect by returning early if gadget->connected is
already set.

Bug: 276227797
Fixes: 5a1da544 ("usb: gadget: core: do not try to disconnect gadget if it is not connected")
Cc: stable@vger.kernel.org
Change-Id: I60b23114c0df7b282bcb1ce638683960305992c5
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20230407030741.3163220-2-badhri@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit a3afbf5c
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/ usb-next)