[mlir][spirv] Add base classes for vendor ops

[kuhar]

Summary

This is the first patch in the series to rename vendor ops from
spv.NameVENDOR to spv.VENDOR.Name. The goal is to make the SPIR-V
dialect more internally consistent.

Issue: https://github.com/llvm/llvm-project/issues/56863

[kuhar]

Closed by https://reviews.llvm.org/rG6a378b38ff30a970bf3aa06ae2819679ba2747b0

mlir/include/mlir/Dialect/SPIRV/IR/SPIRVBase.td

class SPV_ExtInstOp<string mnemonic, string setPrefix, string setName,
 
   // Opcode within extended instruction set.
   int extendedInstOpcode = opcode;
 
   // Name used to import the extended instruction set.
   string extendedInstSetName = setName;
 }
 
+// Base classes for SPIR-V vendor ops. These have opcode in the form of
+// Op<Name><VENDOR>, e.g., OpCooperativeMatrixStoreNV.
+class SPV_VendorOp<string mnemonic, string vendorName,
+                   list<Trait> traits = []> :
+  SPV_Op<mnemonic # vendorName, traits> {
+  string spirvOpName = "Op" # mnemonic # vendorName;
+}
+
+class SPV_ExtVendorOp<string mnemonic, list<Trait> traits = []> :
+  SPV_VendorOp<mnemonic, "EXT", traits> {
+}
+
+class SPV_KhrVendorOp<string mnemonic, list<Trait> traits = []> :
+  SPV_VendorOp<mnemonic, "KHR", traits> {
+}
+
+class SPV_IntelVendorOp<string mnemonic, list<Trait> traits = []> :
+  SPV_VendorOp<mnemonic, "INTEL", traits> {
+}
+
+class SPV_NvVendorOp<string mnemonic, list<Trait> traits = []> :
+  SPV_VendorOp<mnemonic, "NV", traits> {
+}
+
 #endif // MLIR_DIALECT_SPIRV_IR_BASE