Refactor loading a pointer and loading an integer64 into a register instructions for X64

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index c715bcef96531429aa0ba2c1f897da424cf303c1..c43c32e81fad6c2b69328c918b68c1bb6c286636 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -719,10 +719,10 @@ class Assembler : public AssemblerBase {
 
   // Move sign extended immediate to memory location.
   void movq(const Operand& dst, Immediate value);
-  // Instructions to load a 64-bit immediate into a register.
-  // All 64-bit immediates must have a relocation mode.
+  // Loads a pointer into a register with a relocation mode.
   void movq(Register dst, void* ptr, RelocInfo::Mode rmode);
-  void movq(Register dst, int64_t value, RelocInfo::Mode rmode);
+  // Loads a 64-bit immediate into a register.
+  void movq(Register dst, int64_t value);
   // Moves the address of the external reference into the register.
   void movq(Register dst, ExternalReference ext);
   void movq(Register dst, Handle<Object> handle, RelocInfo::Mode rmode);