[fir][NFC] Move MLIR includes to FIRDialect.td

The fir_Dialect definition was coming silently through FIRTypes.td.
Make the include of flang/Optimizer/Dialect/FIRDialect.td explicit in
FIROps.td and move MLIR includes to FIRDialect.td.

This patch is part of the upstreaming effort from fir-dev branch.

Reviewed By: AlexisPerry

Differential Revision: https://reviews.llvm.org/D112418

Co-authored-by: Eric Schweitz <eschweitz@nvidia.com>

flang/include/flang/Optimizer/Dialect/FIRDialect.td

@@ -14,6 +14,12 @@
 #ifndef FORTRAN_DIALECT_FIR_DIALECT
 #define FORTRAN_DIALECT_FIR_DIALECT
 
+include "mlir/IR/SymbolInterfaces.td"
+include "mlir/Interfaces/CallInterfaces.td"
+include "mlir/Interfaces/ControlFlowInterfaces.td"
+include "mlir/Interfaces/LoopLikeInterface.td"
+include "mlir/Interfaces/SideEffectInterfaces.td"
+
 def fir_Dialect : Dialect {
   let name = "fir";
   let cppNamespace = "::fir";

flang/include/flang/Optimizer/Dialect/FIROps.td

@@ -14,11 +14,7 @@
 #ifndef FORTRAN_DIALECT_FIR_OPS
 #define FORTRAN_DIALECT_FIR_OPS
 
-include "mlir/IR/SymbolInterfaces.td"
-include "mlir/Interfaces/CallInterfaces.td"
-include "mlir/Interfaces/ControlFlowInterfaces.td"
-include "mlir/Interfaces/LoopLikeInterface.td"
-include "mlir/Interfaces/SideEffectInterfaces.td"
+include "flang/Optimizer/Dialect/FIRDialect.td"
 include "flang/Optimizer/Dialect/FIRTypes.td"
 
 // Base class for FIR operations.