drivers: soc: spss_utils: Handle error return from copy_to_user

Handle error return value from copy_to_user() in ioctls to avoid
following compilation failure.

"error: ignoring return value of function declared with 'warn_unused_result'
 attribute".

Change-Id: I92944ade7fb88e0543ca4254fab226da5777def7
Signed-off-by: Jeevan Shriram <quic_jshriram@quicinc.com>