msm: clock-8226: Update DSI PLL power-up sequence

Add new power-up sequences for the DSI PLL. This is
needed to ensure that the DSI PLL locks successfully.

CRs-Fixed: 463111
Change-Id: I176ff0c295acf38dbd2c2b34fd8a108a226e5df4
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>