HV:treewide:Cleanup the type for parameters of bitmap

operations

For reducing sign conversion in hypervisor:
Update parameters of bitmap operations as unsigned type;
Update the input of related caller as unsigned type when the
caller's input parameter is const variable or the variable is
only used by bitmap operations.

V1-->V2:
        (1) Explicit casting for the first parameter
            of all bitmap operations;
        (2) Remove mask operation for explicit casting
            of all bitmap operations, since masking is
            useless. Otherwise, this trucation is dangerous.
V2-->V3:
        (1) Explicit casting for all bitmap operations parameter;
        (2) Masking bit offset with 6-bit;
        (3) Add few comments about bit offset.
V3-->V4:
        add '\' for some statement of bitmap macro

Signed-off-by: Xiangyang Wu <xiangyang.wu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/include/common/schedule.h

@@ -7,8 +7,8 @@
 #ifndef	_HV_CORE_SCHEDULE_
 #define	_HV_CORE_SCHEDULE_
 
-#define	NEED_RESCHEDULE		(1)
-#define	NEED_OFFLINE		(2)
+#define	NEED_RESCHEDULE		(1U)
+#define	NEED_OFFLINE		(2U)
 
 struct sched_context {
 	spinlock_t runqueue_lock;