ASoC: rt5640: Fix ignored error checks
ASoC: rt5640: Fix ignored error checks

The negative error value returned from get_sdp_info() is ignored
because it's assigned to unsigned variables.

Spotted by coverity CIDs 1042657, 1042658.

Signed-off-by: Takashi Iwai <4596b3305151c7ee743192a95d394341e3d3b644@suse.de>
Signed-off-by: Mark Brown <b51b9a92386687a9ac927cebfa0f978adeb8cea5@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs