wcd9xxx: Fix NCP fclk level enable/disable sequence

In concurrency scenarios like Headphone and lineout, NCP fclk
level 8 is enabled twice during IDLE to HPH and HPH to HPH+LO state.
But it is disabled only once during HPH+LO to LO state transition.
This leads to higher sleep current issue. Fix this issue by setting
fclk level 8 and 5 properly for the concurrency scenarios.

Change-Id: I1249cac5f35f7cd7a73374d0c48ec5f8e6428237
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>