defconfig: sa6155: Enable config for dyn splash

Enable CONFIG_DRM_SDE_SHD,CONFIG_DRM_SDE_SHP,
CONFIG_DRM_MSM_LEASE for supporting dynamic splash feature.

Change-Id: I5e8da3c066572812216ee08dfbe77cc1906ad52f
Acked-by: Poojashree Masthi <c_pmasth@qti.qualcomm.com>
Signed-off-by: Rahul Sharma <rahsha@codeaurora.org>