AeroFC: Disable UART8 (#8046)
AeroFC: Disable UART8 (#8046)

* AeroFC: Update defconfig

defconfig generated using: make aerofc-v1_default oldconfig

* AeroFC: Disable UART8

It is not used but it share the same pinout in the FC connector with
other pin used as I2C2, so it needs to stay in high-z.

dagar/Firmware,PX4/Firmware,dagar/Firmware,mcgill-robotics/Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,krbeverx/Firmware,Aerotenna/Firmware,dagar/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,acfloria/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,jlecoeur/Firmware,acfloria/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,jlecoeur/Firmware,acfloria/Firmware,Aerotenna/Firmware,PX4/Firmware,PX4/Firmware,mcgill-robotics/Firmware,PX4/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,acfloria/Firmware,Aerotenna/Firmware,acfloria/Firmware,dagar/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,dagar/Firmware,krbeverx/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,Aerotenna/Firmware,krbeverx/Firmware,Aerotenna/Firmware,PX4/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,PX4/Firmware,krbeverx/Firmware,mcgill-robotics/Firmware