ARM: 5642/1: bcmring: add Makefile/Kconfig/Makefile.boot in mach-bcmring

add arch/arm/mach-bcmring directory

add Kconfig, Makefile, and Makefile.boot in mach-bcmring

Signed-off-by: Leo Chen <leochen@broadcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>