display qcom: allow mako to use jw66 kernel

Change-Id: Iba05f4b439daeb2cf0a4ac71fc7d6f5fd8af8062
display qcom: do not use global cpp flag

at least the result is the same but let us user the
propper way like we do it with all flags and do not
set if over a global cpp flag

Change-Id: Iad45aa8b469e867743c3be695a0037349839a726