MIPS: Followup to '[turbofan] Add basic support for calling to (a subset of) C functions.'

src/compiler/mips/linkage-mips.cc

Index: src/compiler/mips/linkage-mips.cc
diff --git a/src/compiler/mips/linkage-mips.cc b/src/compiler/mips/linkage-mips.cc
index 3378213af3237f5fd9651c60ba9afd4667e4da2e..df1b1798699ca0440e07b67185a3ad566b082dec 100644
--- a/src/compiler/mips/linkage-mips.cc
+++ b/src/compiler/mips/linkage-mips.cc
@@ -28,7 +28,7 @@ struct MipsLinkageHelperTraits {
     return register_parameters[i];
   }
   static int CRegisterParametersLength() { return 4; }
-  static int CStackBackingStoreLength() { return 0; }
+  static int CStackBackingStoreLength() { return 4; }
 };