msm: mdss: disable hw underrun recovery only for older mdp reversions

HW underrun recovery in newer mdp revisions is h/w bug free. Enabling
it may help avoid system wide stability issues.

CRs-fixed: 723006
Change-Id: Ide52f68b272a66e18f62535f091faea91f7f13c7
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>