pinctrl: starfive: Use a static name for the GPIO irq_chip

Drop the device name used for the GPIO irq_chip and replace it
with something static. The information is still available from
debugfs and carried as part of the irqdomain.

Suggested-by: Emil Renner Berthing <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Cc: Linus Walleij <[e-mail]>
Cc: Bartosz Golaszewski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/pinctrl-starfive.c

···
 }
 
 static struct irq_chip starfive_irq_chip = {
+	.name = "StarFive GPIO",
 	.irq_ack = starfive_irq_ack,
 	.irq_mask = starfive_irq_mask,
 	.irq_mask_ack = starfive_irq_mask_ack,
···
 	sfp->gc.ngpio = NR_GPIOS;
 
 	starfive_irq_chip.parent_device = dev;
-	starfive_irq_chip.name = sfp->gc.label;
 
 	sfp->gc.irq.chip = &starfive_irq_chip;
 	sfp->gc.irq.parent_handler = starfive_gpio_irq_handler;