Revert "firewire: ohci: use devres for requested IRQ"

This reverts commit 5a95f1de.

As long as allocating any device interrupt vector for MSI, it is
inconvenient to utilize managed device resources for IRQ requesting.

Link: https://lore.kernel.org/r/20240331135037.191479-2-o-takashi@sakamocchi.jp


Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>