- move GPS frame decoding in the same loop serialCom()
- GPS_PROMINI is obsolete as now a same port can share MSP command + GPS frame. They must however share the same UART speed

git-svn-id: http://multiwii.googlecode.com/svn/trunk/MultiWii_shared@1715 02679b44-d973-9852-f2fa-63770883b36c