asoc: audio-ext-clk: Add support for multiple lpass clock nodes

In bolero, for VA and WSA macros require multiple
lpass clock sources. Update audio clock driver
to support lpass clocks instances as required for
VA and WSA.

Change-Id: I7bb676dcbd5c0db09079dd73a30d1b47ce0f8ace
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>