net/ethernet: convert drivers/net/ethernet/* to use module_platform_driver()

net/ethernet: convert drivers/net/ethernet/* to use module_platform_driver()

This patch converts the drivers in drivers/net/ethernet/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Cc: "David S. Miller" <[email protected]>
Cc: Pantelis Antoniou <[email protected]>
Cc: Vitaly Bordug <[email protected]>
Cc: Wan ZongShun <[email protected]>
Cc: Nicolas Pitre <[email protected]>
Cc: Giuseppe Cavallaro <[email protected]>
Cc: Marc Kleine-Budde <[email protected]>
Cc: Jeff Kirsher <[email protected]>
Cc: Jiri Pirko <[email protected]>
Cc: Daniel Hellstrom <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Tobias Klauser <[email protected]>
Cc: Grant Likely <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Richard Cochran <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: Sebastian Poehn <[email protected]>
Cc: Yoshihiro Shimoda <[email protected]>
Cc: Ricardo Ribalda Delgado <[email protected]>
Cc: "Michał Mirosław" <[email protected]>
Signed-off-by: Axel Lin <[email protected]>
Acked-by: Wan ZongShun <[email protected]>
Signed-off-by: David S. Miller <[email protected]>