msm: HTC: add missing cam_clk

Used by jet's front facing camera (s5k6a1gx).

Change-Id: I98440cf80c30154f4b47300dd2b36a5104e40fa3
msm: HTC: jet: remove duplicate camera I2C driver registration

Change-Id: I4bc2bffb529bdb22789060bc2f132e42da322fae