msm: mdss: mdss: g2_dcm: remove stock rom dependecy process.

this is JPN/DCM carrier specific logo only.
it is no need Cyanogenmod base rom, because it does not have "/initlogo_dcm_xi.rle""
and it is shown invalid frame a few times at phone starting.

Change-Id: I3c0800518fc5cf83f1c47ce406056bf765088b84