sunxi: clock: improve grouping of default clock register values

sunxi: clock: improve grouping of default clock register values

With each new SoC added to the clock_sun50i_h6.h header file, we add a
list of default values for the bus clock registers. This list gets a bit
hard to read, as the spacing between the lines looks confusing.

Tighten the lines by removing empty lines, to make it more obvious which
values belong together. Also remove those comments that were more or
less duplicating the next code line, and didn't add any information.

This makes it easier to find existing values and to add support for new
SoCs.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>