[PATCH] kbuild: Enable dtc 'pci_device_reg' warning by default

[nicolas saenz julienne]

On Fri, 2021-08-20 at 11:50 -0500, Rob Herring wrote:
> There's only a couple of instances of the 'pci_device_reg' warnings left
> and they look legit, so let's enable the warning by default.
> 
> Cc: Heiko Stuebner <heiko at sntech.de>
> Cc: Nicolas Saenz Julienne <nsaenz at kernel.org>
> Cc: soc at kernel.org
> Signed-off-by: Rob Herring <robh at kernel.org>
> ---
> These are the 2 remaining warnings:
> 
> arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi:464.3-52: Warning (pci_device_reg): /pcie at f8000000/pcie at 0,0:reg: PCI reg address is not configuration space
> arch/arm/boot/dts/bcm2711-rpi-4-b.dts:220.10-231.4: Warning (pci_device_reg): /scb/pcie at 7d500000/pci at 1,0: PCI unit address format error, expected "0,0"

Just for the record, bcm2771 issue is being fixed here:
https://lkml.org/lkml/2021/8/30/232

Regards,
Nicolas