Fix Stochastic sampling trap handler

The trap handler should read the PERF_SNAPSHOT_DATA after all of
PERF_SNAPSHOT_DATA, PERF_SNAPSHOT_PC_LO and PERF_SNAPSHOT_PC_HI.  This
patch fixes this.

Change-Id: I7f78e16d7a0d8bfebb34906b4dff73c2eaeb5658

runtime/hsa-runtime/core/runtime/trap_handler/trap_handler.s

@@ -507,12 +507,12 @@ trap_entry:
   s_waitcnt       			lgkmcnt(0)                      // Wait for timestamp
   s_store_dwordx2 			ttmp[4:5], ttmp[2:3] 0x30       // Store timestamp
 
-  s_getreg_b32    			ttmp4, hwreg(HW_REG_SQ_PERF_SNAPSHOT_DATA)
-  s_getreg_b32   	 	  	ttmp5, hwreg(HW_REG_SQ_PERF_SNAPSHOT_DATA1)
-  s_store_dwordx2 			ttmp[4:5], ttmp[2:3], 0x24            // store snapshot PC
   s_getreg_b32          		ttmp4, hwreg(HW_REG_SQ_PERF_SNAPSHOT_PC_LO)
   s_getreg_b32          		ttmp5, hwreg(HW_REG_SQ_PERF_SNAPSHOT_PC_HI)
   s_store_dwordx2 			ttmp[4:5], ttmp[2:3] 0x00       // store snapshot data
+  s_getreg_b32   	 	  	ttmp5, hwreg(HW_REG_SQ_PERF_SNAPSHOT_DATA1)
+  s_getreg_b32    			ttmp4, hwreg(HW_REG_SQ_PERF_SNAPSHOT_DATA)
+  s_store_dwordx2 			ttmp[4:5], ttmp[2:3], 0x24            // store snapshot PC
 
   s_mov_b32       			ttmp6, exec_lo
   s_store_dword   			ttmp6, ttmp[2:3], 0x8           // store EXEC_LO