hal: Replace property_get_int32 with property_get

We get afe_api_version with property_get_int32
which does not work. Instead get api version
with property_get.

Change-Id: Ifd191a3903c180039d4708690edf2b1842119c37
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>