STM32L4 : Fix GPIO G port compatibility#3780

Merged

0xc0170 merged 2 commits intoARMmbed:masterfrom

pmancele:master

Mar 6, 2017

Commits on Feb 22, 2017

Fix GPIOG usage of STM32L4 by activating VDDIO2 power supply
pmancele
committed

Commits on Feb 23, 2017

Use #if defined TARGET_STM32L4
pmancele
committed