MAINTAINERS: corrected bcm2835 search

Corrected bcm2835 maintainer info by using N: to specify any files with
bcm2835 in are directed to the proper maintainer.
Also corrected minor mispelling of ARCHITECTURE in 2 comment locations.

Signed-off-by: Scott Branden <[e-mail]>
Signed-off-by: Stephen Warren <[e-mail]>
Signed-off-by: Olof Johansson <[e-mail]>

MAINTAINERS

···
 F:	drivers/mmc/host/sdhci-bcm-kona.c
 F:	drivers/clocksource/bcm_kona_timer.c
 
-BROADCOM BCM2835 ARM ARCHICTURE
+BROADCOM BCM2835 ARM ARCHITECTURE
 M:	Stephen Warren <[e-mail]>
 L:	[e-mail] (moderated for non-subscribers)
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-rpi.git
 S:	Maintained
-F:	arch/arm/mach-bcm/board_bcm2835.c
-F:	arch/arm/boot/dts/bcm2835*
-F:	arch/arm/configs/bcm2835_defconfig
-F:	drivers/*/*bcm2835*
+N:	bcm2835
 
-BROADCOM BCM5301X ARM ARCHICTURE
+BROADCOM BCM5301X ARM ARCHITECTURE
 M:	Hauke Mehrtens <[e-mail]>
 L:	[e-mail]
 S:	Maintained