FAB_ID can be used across multiple drivers that gets revid information from qpnp-revid driver. Move the FAB_ID definitions in RR_ADC driver for pmi8998 and pm660 so that they can be reused by other clients. Change-Id: Ia61af56244161c948b0f458a77e699c1cac871b1 Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>