UPSTREAM: usb: gadget: udc: core: remove usage of list iterator past the loop body

To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable [1].

Link: https://lore.kernel.org/all/YhdfEIwI4EdtHdym@kroah.com/


Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
Link: https://lore.kernel.org/r/20220308171818.384491-25-jakobkoschel@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

(cherry picked from commit 2eb27f79)

Bug: 275538389
Change-Id: I06eedfb158c394a58f2e28980290b992f752ba15
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>