dev: gcdb: display: handle DSI PLL source selection properly

The DSI PLL source variable needs to be updated only for
single/split DSI use-cases. For dual DSI use cases, both the
DSI PLLs will be used and the DSI PLL source doesn't need to
be set explicitly. Handle this properly in mdss_dsi_set_pll_src
API.

Change-Id: Ibbe0a5c294399349c2d6a71e6e94b4c3624de5f2
2 files changed