qdutils: Parse panel type dynamically from panel info

Parse the panel type from the panel info string using string operations
rather than relying on constant offset (which would have to be update for
any changes in length to the preceding MDP/MDSS version string). Assumes
that panel type is the first character after the first '_' in the panel
info string.

Change-Id: I33178e7219c26e0e0361e53941f15a3d38f99b71
1 file changed