clk: mmp: fix wrong mask when calculate denominator
clk: mmp: fix wrong mask when calculate denominator

The code has typo when calculate denominator. It should use
den_mask instead of num_mask.

Signed-off-by: Chao Xie <4e92301452ced7a9cf1e5ca194da9c30c818b2d6@marvell.com>
Signed-off-by: Mike Turquette <6dab61939fc5e23761050a66932f032dceda5ebf@linaro.org>

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