Correct the kerneldoc for a few structure and function calls,
as reported by C=1 W=1.

Cc: Alexandru Ardelean <alexaundru.ardelean@analog.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>