async: make async a command line option for now
async: make async a command line option for now

... and have it default off.
This does allow people to work with it for testing.

Signed-off-by: Arjan van de Ven <9043bf4b08f6c93a2cb55d98c3494b123858348f@linux.intel.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs