msm: camera: Implement Pantech modifications

Change-Id: I5e431bad72ef0a7ddf035c923abe8774489b0254
pantech: kconfig: add generic Pantech label.

Use this config to add codes or avoid orphan codes, that's
not labeled with a: CONFIG or FEATURE

Change-Id: I09fccf8bfcd85c418ddffa740870f99c1ae922b7