usb: xhci: replace goto with return when possible in handle_tx_event()

Simplifying the handle_tx_event() function by addressing the complexity
of its while loop. Replaces specific 'goto cleanup' statements with
'return' statements, applicable only where 'ep->skip' is set to 'false',
ensuring loop termination.

The original while loop, combined with 'goto cleanup', adds unnecessary
complexity. This change aims to untangle the loop's logic, facilitating a
more straightforward review of the upcoming comprehensive rework.

Signed-off-by: Niklas Neronin <[email protected]>
Signed-off-by: Mathias Nyman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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