Makefile: Enable jlink_spi by default

Now that we give proper hints in case of missing dependencies, we can
enable the `jlink_spi` driver by default.

Change-Id: Idb3d40ba39ef720093409158d39ec32266969410
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/73447
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed