clk: keystone: syscon-clk: fix regmap leak on probe failure

The mmio regmap 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: a250cd4 ("clk: keystone: syscon-clk: Do not use syscon helper to build regmap")
Cc: stable@vger.kernel.org	# 6.15
Cc: Andrew Davis <afd@ti.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: jhovold

drivers/clk/keystone/syscon-clk.c

@@ -129,7 +129,7 @@ static int ti_syscon_gate_clk_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	regmap = regmap_init_mmio(dev, base, &ti_syscon_regmap_cfg);
+	regmap = devm_regmap_init_mmio(dev, base, &ti_syscon_regmap_cfg);
 	if (IS_ERR(regmap))
 		return dev_err_probe(dev, PTR_ERR(regmap),
 				     "failed to get regmap\n");