Revert "arm64: dmi: Add SMBIOS/DMI support"

This reverts commit a28e3f4b90543f7c249a956e3ca518e243a04618.

Ard and Yi Li report that this patch is broken by design, so revert it
and let them sort it out for 3.18 instead.

Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --cc arch/arm64/Kconfig
Simple merge

diff --cc arch/arm64/include/asm/dmi.h
Simple merge

diff --cc arch/arm64/kernel/setup.c
Simple merge