[lldb,FreeBSD] getValue => operator* for Optional migration

(cherry picked from commit 003f2b3)

Author: MaskRay

lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_mips64.cpp

@@ -130,7 +130,7 @@ NativeRegisterContextFreeBSD_mips64::ReadRegister(const RegisterInfo *reg_info,
     return error;
   }
 
-  RegSetKind set = opt_set.getValue();
+  RegSetKind set = *opt_set;
   error = ReadRegisterSet(set);
   if (error.Fail())
     return error;
@@ -164,7 +164,7 @@ Status NativeRegisterContextFreeBSD_mips64::WriteRegister(
     return error;
   }
 
-  RegSetKind set = opt_set.getValue();
+  RegSetKind set = *opt_set;
   error = ReadRegisterSet(set);
   if (error.Fail())
     return error;

lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_powerpc.cpp

@@ -181,7 +181,7 @@ NativeRegisterContextFreeBSD_powerpc::ReadRegister(const RegisterInfo *reg_info,
     return error;
   }
 
-  RegSetKind set = opt_set.getValue();
+  RegSetKind set = *opt_set;
   error = ReadRegisterSet(set);
   if (error.Fail())
     return error;
@@ -215,7 +215,7 @@ Status NativeRegisterContextFreeBSD_powerpc::WriteRegister(
     return error;
   }
 
-  RegSetKind set = opt_set.getValue();
+  RegSetKind set = *opt_set;
   error = ReadRegisterSet(set);
   if (error.Fail())
     return error;