asoc: codecs: Correct the clk users increment/decrement logic

The clk users count goes out of sync with the actual
clk requests from clients during SSR/PDR. Increment the
clk users only after the clk request is successful.

Change-Id: I512f037a118f4763a64e7a64f7f559bcfa37a37f
Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>