clk: qcom: msm8916: fix mnd_width for codec_digcodec

This patch fixes missing mnd_width for codec_digital clk, this is now set to
8 inline with datasheet.

Fixes: 3966fab8 ("clk: qcom: Add MSM8916 Global Clock Controller support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>