firewire: ohci: use TCODE_LINK_INTERNAL consistently

firewire: ohci: use TCODE_LINK_INTERNAL consistently

In IEEE 1394 specification, 0x0e in tcode field is reserved for internal
purpose depending on link layer. In 1394 OHCI specification, it is used to
express phy packet in AT/AR contexts.

Current implementation of 1394 OHCI driver has several macros for the code.
They can be simply replaced with a macro in core code.

This commit obsoletes the macros.

Link: https://lore.kernel.org/r/20240729134631.127189-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>