modify WINC1500_IPvP -> WINC1500_IPv6
modify WINC1500_IPvP -> WINC1500_IPv6

ARMmbed/mbed-client,tridonic-com/mbed-client,tridonic-com/mbed-client,tridonic-com/mbed-client,ARMmbed/mbed-client,ARMmbed/mbed-client