[RAMEN9610-9963][COMMON] lib: dss: add DEBUG_SNAPSHOT_USER_MODE and debug level

[RAMEN9610-9963][COMMON] lib: dss: add DEBUG_SNAPSHOT_USER_MODE and debug level

This commit adds DEBUG_SNAPSHOT_USER_MODE and debug level.
If DEBUG_SNAPSHOT_USER_MODE is enabled, DEBUG_SNAPSHOT_MINIMIZED_MODE
is enabled too and debug_level is set by low.

It means that DEBUG_SNAPSHOT_USER_MODE is static level(build time)
debugging, debug level is runtime debugging.

debug level is able to conrol in bootloader.

Change-Id: Idedb764b82d7bfcfd313774827b71517d92e6fae
Signed-off-by: Hosung Kim <hosung0.kim@samsung.com>