disp: msm: enable event log and disp ramdump without DEBUG_FS

This patch allows event log and display ramdump
module compilation when DEBUG_FS config is in disabled
state.

Change-Id: Ibe1ff7d9d4a4f3c64091df757caba2450295e7ec
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>