ASoC: Intel: Skylake: Fix fw reload failure

FW reload had two issues:
 - We need to disable the core 0 on when fw fails
 - Before loading firmware mark boot flag as false

This patch fixes these two

Signed-off-by: Senthilnathan Veppur <senthilnathanx.veppur@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>