net: qualcomm: rmnet: remove unused variable priv

priv is being assigned but is never used, so remove it.

Cleans up clang build warning:
"warning: Value stored to 'priv' is never read"

Fixes: ceed73a2 ("drivers: net: ethernet: qualcomm: rmnet: Initial implementation")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>