Make Console::m_rows/m_columns const for now.

Author: awesomekling

Kernel/Console.h

@@ -15,8 +15,8 @@ class Console final : public CharacterDevice {
 private:
     void putChar(char);
 
-    byte m_rows { 25 };
-    byte m_columns { 80 };
+    const byte m_rows { 25 };
+    const byte m_columns { 80 };
     byte m_cursorRow { 0 };
     byte m_cursorColumn { 0 };