Use a MutableArrayRef. NFC.

llvm-svn: 305968
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
index 6d3d4db..91f2714 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
@@ -235,9 +235,9 @@
 /// ApplyFixup - Apply the \p Value for given \p Fixup into the provided
 /// data fragment, at the offset specified by the fixup and following the
 /// fixup kind as appropriate.
-void MipsAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
-                                unsigned DataSize, uint64_t Value, bool IsPCRel,
-                                MCContext &Ctx) const {
+void MipsAsmBackend::applyFixup(const MCFixup &Fixup,
+                                MutableArrayRef<char> Data, uint64_t Value,
+                                bool IsPCRel, MCContext &Ctx) const {
   MCFixupKind Kind = Fixup.getKind();
   Value = adjustFixupValue(Fixup, Value, Ctx);