phy: zynqmp: Store instance instead of type

phy: zynqmp: Store instance instead of type

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.dev
Signed-off-by: Vinod Koul <vkoul@kernel.org>
[ Linux commit 6959d2367bc3503ac4ba3eb4ec6584a43150d6b3 ]
Link: https://lore.kernel.org/r/20260106215501.727524-4-sean.anderson@linux.dev
Signed-off-by: Michal Simek <michal.simek@amd.com>