Input: wm97xx - make missing platform data non-fatal

Commit 6480af4915d6 ("power_supply: wm97xx_battery: use
power_supply_get_drvdata") made wm97xx platform data mandatory, although
it's still optional.

This patch fixes an oops during driver probe on one of my MIPS boards with
a wm9712.

Signed-off-by: Manuel Lauss <[email protected]>
Reviewed-by: Robert Jarzmik <[email protected]>
Acked-by: Charles Keepax <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
1 file changed