irqchip/ls-scfg-msi: Fix NULL dereference in error handling

The call to irq_domain_remove(msi_data->parent); was accidentally left
behind during a code refactor. It's not necessary to free
"msi_data->parent" because it is NULL and, in fact, trying to free it
will lead to a NULL pointer dereference. Delete the unnecessary code.

Fixes: 94b59d5f567a ("irqchip/ls-scfg-msi: Switch to use msi_create_parent_irq_domain()")
Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Reviewed-by: Nam Cao <[e-mail]>
Link: https://lore.kernel.org/all/[e-mail]

drivers/irqchip/irq-ls-scfg-msi.c

···
 	msi_data->parent = msi_create_parent_irq_domain(&info, &ls_scfg_msi_parent_ops);
 	if (!msi_data->parent) {
 		dev_err(&msi_data->pdev->dev, "failed to create MSI domain\n");
-		irq_domain_remove(msi_data->parent);
 		return -ENOMEM;
 	}