[COMMON] g2d: split the dump function

[COMMON] g2d: split the dump function

In an abnormal state, there may not be any task to run
even in mmu fault and error interrupt state, and
this case might be accessed to NULL pointer on stamp
function, so split the debugging message function
from stamp function and print more information.

Change-Id: Iadb1838c166cdfa3f4221a4ed30888734ba6303f
Signed-off-by: hyesoo.yu <hyesoo.yu@samsung.com>