[deoptimizer] Support float registers and slots.

src/utils.h

Index: src/utils.h
diff --git a/src/utils.h b/src/utils.h
index 9a601416ffd837e48209a3bf5eec80d70d024346..9b94a2feb1de6a7e9fcc8910ec3008e93f4a3bca 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -1524,6 +1524,10 @@ static inline void WriteUnalignedValue(void* p, V value) {
 #endif  // V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64
 }
 
+static inline double ReadFloatValue(const void* p) {
+  return ReadUnalignedValue<float>(p);
+}
+
 static inline double ReadDoubleValue(const void* p) {
   return ReadUnalignedValue<double>(p);
 }