firewire: core: record card index in async_phy_outbound_initiate tracepoints event

The asynchronous transaction is initiated on one of 1394 OHCI
controller, however the existing tracepoints events has the lack of data
about it.

This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.

Link: https://lore.kernel.org/r/20240613131440.431766-5-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>