drm/msm/sde: report qseed3 h/w version in plane caps

Report the contents of the qseed 3 hardware version
register to the user space via the existing capabilities
blob property. This allows the user space the option
of modifying its scaler configuration based on the
indicated hardware version.

Change-Id: Iebaa0199969607d5da5d0b68fb9735665da20673
Signed-off-by: Clarence Ip <cip@codeaurora.org>