msm: clock-fsm9900: Add measure for DDR clock

Add frequency information for DDR channel 0 and channel 1.

Change-Id: Ia24e173b7f1d0e806bd5c77923f4c027eb2305bd
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Venkatesh Yadav Abbarapu <quicvenkat@codeaurora.org>