USB: gadget: validate endpoint index for xilinx udc

mainline inclusion
from mainline-v5.17-rc4
commit 7f14c722
category: bugfix
bugzilla: 186427, https://gitee.com/openeuler/kernel/issues/I4ZWQA


CVE: CVE-2022-27223

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Assure that host may not manipulate the index to point
past endpoint array.

Signed-off-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lijun Fang <fanglijun3@huawei.com>
Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>