pinctrl: stm32: fix hwspinlock resource leak in probe function

[ Upstream commit 002679f ]

In stm32_pctl_probe(), hwspin_lock_request_specific() is called to
request a hwspinlock, but the acquired lock is not freed on multiple
error paths after this call. This causes resource leakage when the
function fails to initialize properly.

Use devm_hwspin_lock_request_specific() instead of
hwspin_lock_request_specific() to automatically manage the hwspinlock
resource lifecycle.

Fixes: 97cfb6c ("pinctrl: stm32: protect configuration registers with a hwspinlock")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Reviewed-by: Antonio Borneo <antonio.borneo@foss.st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: ISCAS-Vulab

drivers/pinctrl/stm32/pinctrl-stm32.c

@@ -1537,7 +1537,7 @@ int stm32_pctl_probe(struct platform_device *pdev)
 		if (hwlock_id == -EPROBE_DEFER)
 			return hwlock_id;
 	} else {
-		pctl->hwlock = hwspin_lock_request_specific(hwlock_id);
+		pctl->hwlock = devm_hwspin_lock_request_specific(dev, hwlock_id);
 	}
 
 	spin_lock_init(&pctl->irqmux_lock);