[PATCH] acpi build fix: x86 setup.c

[PATCH] acpi build fix: x86 setup.c

This is a neverending story

linux/acpi.h contains empty declarations for acpi_boot_init() &
acpi_boot_table_init() but they are nested inside #ifdef CONFIG_ACPI.

So we'll have to #ifdef in arch/i386/kernel/setup.c: setup_arch()

Signed-off-by: Alexander Nyberg <alexn@telia.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>