asoc: soc-core: fix coccinelle warnings

sound/soc/soc-core.c:2708:6-13: WARNING: Assignment of
bool to 0/1
sound/soc/soc-core.c:2726:3-10: WARNING: Assignment of
bool to 0/1

    More information about semantic patching is available at
http://coccinelle.lip6.fr/



Signed-off-by: Nenghua Cao <nhcao@marvell.com>
Signed-off-by: Mark Brown <broonie@linaro.org>