PCI: brcmstb: Remove stale comment

A comment says that Multi-MSI is not supported by the driver.
A past commit [1] added this feature, so the comment is
incorrect and is removed.

[1] commit 198acab ("PCI: brcmstb: Enable Multi-MSI")

Link: https://lore.kernel.org/r/20230623144100.34196-6-james.quinlan@broadcom.com
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>

Author: jamesequinlan

drivers/pci/controller/pcie-brcmstb.c

@@ -439,7 +439,6 @@ static struct irq_chip brcm_msi_irq_chip = {
 };
 
 static struct msi_domain_info brcm_msi_domain_info = {
-	/* Multi MSI is supported by the controller, but not by this driver */
 	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
 		   MSI_FLAG_MULTI_PCI_MSI),
 	.chip	= &brcm_msi_irq_chip,