intel_gpu: allow larger number of groups

There were previously only 8 bits allotted to enumerate the metric
groups, limited the number of groups to 256.
However, there are at least 1433 groups available on the Intel Ponte
Vecchio architecture.

These changes have been tested on the Intel Ponte Vecchio architecture.

src/components/intel_gpu/internal/inc/GPUMetricInterface.h

@@ -135,7 +135,7 @@ typedef struct MetricNode_S {
  * metric code:  group(8) + metrics(8)
  */
 #define METRIC_BITS		  8
-#define METRIC_GROUP_MASK	0xff00
+#define METRIC_GROUP_MASK	0xfff00
 #define METRIC_MASK		  0x00ff
 
 #define CreateGroupCode(mGroupId)		 (((mGroupId+1)<<METRIC_BITS) & METRIC_GROUP_MASK)