Hi,

This patch adjusts the pac73xx sof detection, we were throwing away 2 bytes 
after the sof, but one of those 2 actually is the first magic marker for the 
first MCU, as we may need those markers in the future pass the 2 bytes to 
userspace, this also simplifies the code :)

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>

Regards,

Hans