Update MTU size to actual v3 / v4 size
Update MTU size to actual v3 / v4 size

adein/sdl_ios,davidswi/sdl_ios,FordDev/sdl_ios,kshala-ford/sdl_ios,smartdevicelink/sdl_ios,FordDev/sdl_ios,smartdevicelink/sdl_ios,kshala-ford/sdl_ios,davidswi/sdl_ios,FordDev/sdl_ios,FordDev/sdl_ios,APCVSRepo/sdl_ios,smartdevicelink/sdl_ios,smartdevicelink/sdl_ios,kshala-ford/sdl_ios,APCVSRepo/sdl_ios,kshala-ford/sdl_ios,APCVSRepo/sdl_ios,davidswi/sdl_ios,davidswi/sdl_ios,adein/sdl_ios,APCVSRepo/sdl_ios,smartdevicelink/sdl_ios,kshala-ford/sdl_ios,davidswi/sdl_ios,FordDev/sdl_ios,APCVSRepo/sdl_ios