FROMGIT: usb: dwc3: gadget: increase tx fifo size for ss isoc endpoints

Improve performance of isoc transfers in superspeed by increasing the
number of possible endpoints available, matching that of what was
configured for bulk transfers.

Signed-off-by: Dan Vacura <w36195@motorola.com>
Link: https://lore.kernel.org/r/20220420183338.445622-1-w36195@motorola.com


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

Bug: 229140375
(cherry picked from commit 6a7c7df9
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git

 usb-next)
Change-Id: Iaa105cd98b0f4de3450bb5f6b10df67ed20a8336
Signed-off-by: Dan Vacura <w36195@motorola.com>