irqchip/brcmstb-l2: Match UPG_AUX_AON_INTR2 compatible

The UPG_AUX_AON_INTR2 Level 2 interrupt controller node is defined with
the "brcm,upg-aux-aon-l2-intc" compatible string in Device Tree and
behaves as an edge triggered standard Broadcom STB L2 interrupt
controller.

Signed-off-by: Florian Fainelli <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/irqchip/irq-brcmstb-l2.c

···
 IRQCHIP_DECLARE(brcmstb_l2_intc, "brcm,l2-intc", brcmstb_l2_edge_intc_of_init);
 IRQCHIP_DECLARE(brcmstb_hif_spi_l2_intc, "brcm,hif-spi-l2-intc",
 		brcmstb_l2_edge_intc_of_init);
+IRQCHIP_DECLARE(brcmstb_upg_aux_aon_l2_intc, "brcm,upg-aux-aon-l2-intc",
+		brcmstb_l2_edge_intc_of_init);
 
 static int __init brcmstb_l2_lvl_intc_of_init(struct device_node *np,
 	struct device_node *parent)