linux-samsung-a5y17lte : use gcc6 for wifi module
Fall back to gcc6, because wlan module compiled with gcc10 fails to initialize with module wlan: overflow in relocation type 261 val ffffffbffc000000
error.
Fall back to gcc6, because wlan module compiled with gcc10 fails to initialize with module wlan: overflow in relocation type 261 val ffffffbffc000000
error.