drm/msm/sde: correct out of bound access in catalog

Correct validate function to use proper size clearing
property count array.
Correct copy format function to check bound before
accessing array element.

CRs-Fixed: 2037027
Change-Id: Ied3a8e91eb4e6c2c19632b8f83b35d94d1773bb1
Signed-off-by: Alan Kwong <akwong@codeaurora.org>