qcacmn: Include bitops.h header file to resolve compilation errors

Resolve compilation errors observed on 32-bit platform by including
bitops.h header file.

Change-Id: I907fa298a4ba1e4784dc85166b042512181b0c71
CRs-Fixed: 2037507

qdf/linux/src/i_qdf_atomic.h

@@ -35,6 +35,7 @@
 
 #include <qdf_status.h>         /* QDF_STATUS */
 #include <linux/atomic.h>
+#include <linux/bitops.h>
 
 typedef atomic_t __qdf_atomic_t;