display: Relocate setting file to core

As ambient file is moved to core, setting file can be moved to core.

Change-Id: Ia178a7abb18858414826500270023f4d644d0ed6
Signed-off-by: Yunhee Seo <yuni.seo@samsung.com>

diff --git a/src/display/plugin-common/setting.c b/src/display/setting.c
similarity index 100%
rename from src/display/plugin-common/setting.c
rename to src/display/setting.c

diff --git a/src/display/plugin-common/setting.h b/src/display/setting.h
similarity index 100%
rename from src/display/plugin-common/setting.h
rename to src/display/setting.h