msm: camera: isp: Fix PPI index based on the phy selection

1) There is one to one mapping for ppi index with phy index
but phy select is not always equal to phy number,for some
targets "phy_sel = phy_idx + 1", and for some targets it is
"phy_sel = phy_idx", ppi_index should be updated accordingly.
2) Updated to configure ppi cfg register as.
 for cphy, disable dphy in config register.
 for dphy, do nothing (both cphy and dphy will be selected).
 then enable all lanes.

CRs-Fixed: 3057665
Change-Id: I1d5d66034a5563b5adcb8163acf9a668d10d4a19
Signed-off-by: Vikram Sharma <vikramsa@codeaurora.org>