net: qualcomm: rmnet: Fix a double free

net: qualcomm: rmnet: Fix a double free

There is a typo here so we accidentally free "skb" instead of "skbn".
It leads to a double free and a leak.  After discussing with Subash,
it's better to just move the check before the allocation and avoid the
need to free.

Fixes: ceed73a2cf4a ("drivers: net: ethernet: qualcomm: rmnet: Initial implementation")
Signed-off-by: Dan Carpenter <[email protected]>
Acked-by: Subash Abhinov Kasiviswanathan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>