ASoC: intel: turn off COMPILE_TEST for medfield

Since medfield machine uses SCU_IPC which is not availble for all archs, so
compile test fails on these

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>