atomisp/css: fix return type of sh_css.c:check_infos_match

atomisp/css: fix return type of sh_css.c:check_infos_match

BZ: 23514

The return type should be enum. Currently the boolean is used that is
incorrect.

Change-Id: Ia88db94019998d3d5dd1677f97580ff2941350fc
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-on: http://android.intel.com:8080/34933
Reviewed-by: Shevchenko, Andriy <andriy.shevchenko@intel.com>
Reviewed-by: Kruger, Jozef <jozef.kruger@intel.com>
Reviewed-by: Wang, Wen W <wen.w.wang@intel.com>
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>