msm: msm_fb: Remove Warnings when required BW exceeds Max Bandwidth.

When required BW exceeds max bandwidth, warnings are printed on the
console which are causing performance degradation. This Patch fixes
the issue.

Change-Id: I769f55dd76a3f28639b848bd5461e2ff3abae3f5
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>