[PATCH] [xcore] Only support the 'm' inline assembly memory constraint. NFC.

[Daniel Sanders]

XCore doesn't seem to have any additional constraints. Therefore remove
the target hook.

No functional change intended. Depends on D8173.

http://reviews.llvm.org/D8921

Files:
  lib/Target/XCore/XCoreISelLowering.h

Index: lib/Target/XCore/XCoreISelLowering.h
===================================================================
--- lib/Target/XCore/XCoreISelLowering.h
+++ lib/Target/XCore/XCoreISelLowering.h
@@ -177,12 +177,6 @@
                                  const std::string &Constraint,
                                  MVT VT) const override;
 
-    unsigned getInlineAsmMemConstraint(
-        const std::string &ConstraintCode) const override {
-      // FIXME: Map different constraints differently.
-      return InlineAsm::Constraint_m;
-    }
-
     // Expand specifics
     SDValue TryExpandADDWithMul(SDNode *Op, SelectionDAG &DAG) const;
     SDValue ExpandADDSUB(SDNode *Op, SelectionDAG &DAG) const;

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