The phy "type" is just the combination of protocol and instance, and is
never used apart from that. Store the instance directly, instead of
converting to a type first. No functional change intended.
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Link: https://lore.kernel.org/r/20240628205540.3098010-3-sean.anderson@linux.devSigned-off-by: Vinod Koul <vkoul@kernel.org>