ARM: bcm: Select BRCMSTB_L2_IRQ for bcm2835

commit  7af56188df88b0bc7f0c920eb36878ad6089e78c from
https://github.com/raspberrypi/linux.git

 rpi-5.10.y

The BCM2711 has a number of instances of interrupt controllers handled
by the driver behind the BRCMSTB_L2_IRQ Kconfig option (irq-brcmstb-l2).

Let's select that driver as part of the ARCH_BCM2835 Kconfig option.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Meng Li <Meng.Li@windriver.com>