phy: ti: gmii-sel: fix regmap leak on probe failure

phy: ti: gmii-sel: fix regmap leak on probe failure

commit 4914d67da947031d6f645c81c74f7879e0844d5d upstream.

The mmio regmap that may be allocated during probe is never freed.

Switch to using the device managed allocator so that the regmap is
released on probe failures (e.g. probe deferral) and on driver unbind.

Fixes: 5ab90f40121a ("phy: ti: gmii-sel: Do not use syscon helper to build regmap")
Cc: stable@vger.kernel.org	# 6.14
Cc: Andrew Davis <afd@ti.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Andrew Davis <afd@ti.com>
Link: https://patch.msgid.link/20251127134834.2030-1-johan@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>