usb: xhci: rework xhci_link_segments()

usb: xhci: rework xhci_link_segments()

Prepare for splitting ring segments allocation and initialization by
reworking the xhci_link_segments() function. Segment linking and ring type
checks are moved out of xhci_link_segments(), and the function is renamed
to "xhci_set_link_trb()".

The goal is to keep ring linking within xhci_alloc_segments_for_ring() and
move initialization into a separate function.

Additionally, reorder and simplify xhci_set_link_trb() for better
readability.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20241106101459.775897-16-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>