drivers/spi: Remove DEBUG_SMI guard

Let the linker take care of it.

Change-Id: I67d2636ceb042f833c1b44888b98135d728940e0
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/26870
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
1 file changed