Adding missing includes to sdma_registers.h

Change-Id: Idb2a54f45c810508ae0ebac0ca12853df8025c7a


[ROCm/ROCR-Runtime commit: 912c23a6d5]

projects/rocr-runtime/runtime/hsa-runtime/core/inc/sdma_registers.h

@@ -43,6 +43,9 @@
 #ifndef HSA_RUNTIME_CORE_INC_SDMA_REGISTERS_H_
 #define HSA_RUNTIME_CORE_INC_SDMA_REGISTERS_H_
 
+#include <stddef.h>
+#include <stdint.h>
+
 namespace amd {
 
 // SDMA packet for VI device.