ARM: Alpine: Initial support for Alpine platform

This patch introduces initial architecture and device-tree support.

Signed-off-by: Saeed Bishara <saeed@annapurnalabs.com>
Signed-off-by: Tsahee Zidenberg <tsahee@annapurnalabs.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --cc arch/arm/Kconfig
Simple merge

diff --cc arch/arm/Makefile
Simple merge

diff --cc arch/arm/mach-alpine/Kconfig
Simple merge

diff --cc arch/arm/mach-alpine/Makefile
Simple merge

diff --cc arch/arm/mach-alpine/alpine_machine.c
Simple merge