ASoC: pcm: change capture_active to unsigned int

In combo usecase there are 2 front-end dai's with
same codec dai, for example, multi-phrase ADSP SVA detection.
Using a single bit as the counter causes the counter to roll
over to 0 during combo usecase.
To resolve this, change counter to unsigned int from single bit.

CRs-Fixed: 1086127
Change-Id: I2dd07bd967b7d4fb4878b6d65bd0f011c6b15bdd
Signed-off-by: Walter Yang <yandongy@codeaurora.org>