arm: Re-sync asm/mach-types.h with Linux Kernel v4.9

This re-syncs the MACH_TYPE_xxx values from the Linux Kernel v4.9
release.  In addition this removes all of the machine_arch_type and
machine_is_xxx logic that is unused in U-Boot.  This removal removes a
large number of otherwise unused CONFIG values from the list to be
converted.

Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Tested-by: Adam Ford <aford173@gmail.com>