msm: audio: qdsp6v2: Use IS_ERR instead of NULL ptr check

pil_get() returns ERR_PTR and hence NULL pointer check should
be replaced with IS_ERR to check for errors.

Change-Id: I87713ab1369921b4d3452f734bbe2ce1e20c0b01
Signed-off-by: Shiv Maliyappanahalli <smaliyap@codeaurora.org>
1 file changed