Add API entrypoints for Cross Memory Attach

Implement two new API for cross memory read and write operation.
 - hsaKmtProcessVMRead
 - hsaKmtProcessVMWrite

Add new ioclts necessary for the above APIs.

Change-Id: I0c153e3b4e1f32b7a8b102ad5c774d9ae9bfc2fa
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>

include/hsakmttypes.h

@@ -1008,6 +1008,11 @@ typedef struct _HsaPointerInfo {
 
 typedef HSAuint32 HsaSharedMemoryHandle[8];
 
+typedef struct _HsaMemoryRange {
+	void               *MemoryAddress;   // Pointer to GPU memory
+	HSAuint64          SizeInBytes;      // Size of above memory
+} HsaMemoryRange;
+
 #pragma pack(pop, hsakmttypes_h)