clk: socfpga: Use NULL instead of 0
clk: socfpga: Use NULL instead of 0

'div_reg' is a pointer. Assign NULL instead of 0.

Signed-off-by: Sachin Kamat <1c3b1584a6008857f36c03c58f657c0fc16fc09e@linaro.org>
Acked-by: Dinh Nguyen <a48724738fc762a7f206428dfcaf7ede2fd84d0f@altera.com>
Signed-off-by: Mike Turquette <6dab61939fc5e23761050a66932f032dceda5ebf@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs