MAINTAINERS: extend BCM5301X ARM ARCHITECTURE files

This patch extends the existing entry for the
"BROADCOM BCM5301X ARM ARCHITECTURE" to include
files belonging to the BCM5301X.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

MAINTAINERS

@@ -3433,7 +3433,7 @@ M:	bcm-kernel-feedback-list@broadcom.com
 L:	linux-arm-kernel@lists.infradead.org
 S:	Maintained
 F:	arch/arm/boot/dts/bcm470*
-F:	arch/arm/boot/dts/bcm5301x*.dtsi
+F:	arch/arm/boot/dts/bcm5301*
 F:	arch/arm/boot/dts/bcm953012*
 F:	arch/arm/mach-bcm/bcm_5301x.c