This commit adds the Synopsys source code for the arc ADC driver. Change-Id: I140a63505685cda8ec9d3174b7cf4fc1e2e91b06 Signed-off-by: Anas Nashif <anas.nashif@intel.com> Signed-off-by: Juan Manuel Cruz <juan.m.cruz.alcaraz@linux.intel.com>