r6040: cleanups

- use netdev_alloc_skb
- remove an useless variable in the IRQ handler
- remove an unused private structure member
- fix a spelling mistake

Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
1 file changed