MAINTAINERS: Update BCM281XX/BCM11XXX/BCM216XX entry

There are many clock, pinctl, and misc others that should be covered
under the BCM281XX/BCM11XXX/BCM216XX ARM listing.  Change the entry to
use regex's that should cover all the files.

Also, remove the bcm_defconfig entry (as the file is being removed), and
arch/arm64/boot/dts/broadcom reference (as that is not accurate for this
group of maintainers and all the device trees under it should now be
covered by other maintainer entries).

Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

MAINTAINERS

@@ -2481,14 +2481,11 @@ M:	Scott Branden <sbranden@broadcom.com>
 M:	bcm-kernel-feedback-list@broadcom.com
 T:	git git://github.com/broadcom/mach-bcm
 S:	Maintained
+N:	bcm281*
+N:	bcm113*
+N:	bcm216*
+N:	kona
 F:	arch/arm/mach-bcm/
-F:	arch/arm/boot/dts/bcm113*
-F:	arch/arm/boot/dts/bcm216*
-F:	arch/arm/boot/dts/bcm281*
-F:	arch/arm64/boot/dts/broadcom/
-F:	arch/arm/configs/bcm_defconfig
-F:	drivers/mmc/host/sdhci-bcm-kona.c
-F:	drivers/clocksource/bcm_kona_timer.c
 
 BROADCOM BCM2835 ARM ARCHITECTURE
 M:	Stephen Warren <swarren@wwwdotorg.org>