libhsakmt: Update context save handling for multi XCC

Allocate debug area big enough for all XCCs in the partition. Also, fix
the cu_num calculations as driver now reports cu_num as the total number
of CUs in the partition.

Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Change-Id: I6e80d57196b770bb3c2506bc58cb366c0046084b

include/hsakmttypes.h

@@ -329,10 +329,10 @@ typedef struct _HsaNodeProperties
     HSAuint32       VGPRSizePerCU;     // VGPR size in bytes per CU
     HSAuint32       SGPRSizePerCU;     // SGPR size in bytes per CU
 
+    HSAuint32       NumXcc;            // Number of XCC
     HSAuint32       KFDGpuID;          // GPU Hash ID generated by KFD
 
     HSAuint32       FamilyID;          // GPU family id
-    HSAuint8        Reserved[4];
 } HsaNodeProperties;