staging: r8188: reformat the power transition steps

Clean up the definitions of the power transition steps and address some
checkpatch warnings.

Reduce the line lengths where possible. Add spaces between elements.
Rewrite comments that are in contradiction with the definition they
describe.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20211219183926.4746-9-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>