gpio: graniterapids: Add missing raw_spinlock_init()

Add the missing raw_spin_lock_init() call to gnr_gpio_probe().

Fixes: ecc4b1418e23 ("gpio: Add Intel Granite Rapids-D vGPIO driver")
Signed-off-by: Aapo Vienamo <[e-mail]>
Acked-by: Mika Westerberg <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bartosz Golaszewski <[e-mail]>

drivers/gpio/gpio-graniterapids.c

···
 	if (!priv)
 		return -ENOMEM;
 
+	raw_spin_lock_init(&priv->lock);
+
 	regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);