staging: otus: fix compile warning and some style issues
staging: otus: fix compile warning and some style issues

In today linux-next I got a compile warning in staging/otus driver.
This patch solves the issue and also improves the coding style.

Signed-off-by: Roberto Rodriguez Alcala <5bf9d7d3bc6cca513c030b49b800cf28d9696191@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@suse.de>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs