defconfig: msm: avoid compilation of MDSS DP driver for 32-bit msmfalcon

The MDSS DP driver has compilation issues on msmfalcon 32-bit builds.
Remove config for the driver to skip compilation till the relevant
issues are resolved.

Change-Id: I8b4d464c793fd943abca2b9041f5751abc9ed22b
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>