Rename tablegen file for DS instructions

Author: mbrkusanin

llvm/lib/Target/AMDGPU/LDSDIRInstructions.td renamed to llvm/lib/Target/AMDGPU/DSDIRInstructions.td

@@ -30,7 +30,7 @@ include "SMInstructions.td"
 include "FLATInstructions.td"
 include "BUFInstructions.td"
 include "EXPInstructions.td"
-include "LDSDIRInstructions.td"
+include "DSDIRInstructions.td"
 include "VINTERPInstructions.td"
 
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