MAINTAINERS: Add brcmstb PCIe controller entry

The controller serves both the Raspberry Pi 4 (bcm2711) and brcmstb
platforms.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

MAINTAINERS

@@ -3237,6 +3237,8 @@ S:	Maintained
 N:	bcm2711
 N:	bcm2835
 F:	drivers/staging/vc04_services
+F:	Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
+F:	drivers/pci/controller/pcie-brcmstb.c
 
 BROADCOM BCM47XX MIPS ARCHITECTURE
 M:	Hauke Mehrtens <hauke@hauke-m.de>
@@ -3292,6 +3294,8 @@ F:	drivers/bus/brcmstb_gisb.c
 F:	arch/arm/mm/cache-b15-rac.c
 F:	arch/arm/include/asm/hardware/cache-b15-rac.h
 N:	brcmstb
+F:	Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
+F:	drivers/pci/controller/pcie-brcmstb.c
 
 BROADCOM BMIPS CPUFREQ DRIVER
 M:	Markus Mayer <mmayer@broadcom.com>