board_f: powerpc: Rename get_clocks_866() to get_clocks()

board_f: powerpc: Rename get_clocks_866() to get_clocks()

We really don't need to have a name like this in the generic init
sequence. Use the generic get_clocks() name so that we can merge these
two at some point.

Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: York Sun <[email protected]>
Reviewed-by: Stefan Roese <[email protected]>