BananaPi: import configuration from cubieboard2

Signed-off-by: Bo Shen <voice.shen@gmail.com>
BananaPi: change board name from cubieboard to BananaPi

Signed-off-by: Bo Shen <voice.shen@gmail.com>
BananaPi: enable SDC0

The detect pin for SDC0 is PH10

Signed-off-by: Bo Shen <voice.shen@gmail.com>
BananaPi: enable GMAC

Signed-off-by: Bo Shen <voice.shen@gmail.com>