[ERD][NEUS7920-76] [COMMON] lib: dss: refactor dbg_snapshot_irq logging

[ERD][NEUS7920-76] [COMMON] lib: dss: refactor dbg_snapshot_irq logging

This commit refactors logging of dbg_snapshot_irq as following.

1. Remove dbg_snapshot_irq_exit logging (actually it is merged to
   dbg_snapshot_irq like measuring latency)
2. Adding logging actually called function in smp_call_function
   to dbg_snapshot_irq. its flag is DSS_FLAG_SMP_CALL_FN.
3. Replace logging from irqaction structure to irq_desc structure.
   irq_desc includes irqaction and it has more informations.
   And we are too hard to see it in ramdump.

Change-Id: I351593a454fd39eb87a965093349d69b6182e7ce
Signed-off-by: Hosung Kim <hosung0.kim@samsung.com>