g2d: improve readability of debugfs/g2d/logs

g2d: improve readability of debugfs/g2d/logs

It is very difficult to understand logs of debugfs/g2d/logs because
it is not human readable. The log is transformed for humans:

before:
[   0] 4:15@1 (0x 4)      0 45742336
[   1] 4:15@2 (0x 4)      1 45743711
[   2] 4: 0@0 (0x 0)      0 45743948
[   3] 4:15@3 (0x10)    251 45743964
[   4] 0: 0@4 (0x 0)  32768 45744660
[   5] 0:15@5 (0x10)    697 45744664
[   6] 4:15@1 (0x 0)      1 45745184
[   7] 0: 0@0 (0x 0)      1 45747519

after:
[2:    77250240]    task_alloc: JOB ID 15 (STATE 0x004) - alloc
[2:    77252363]    task_begin: JOB ID 15 (STATE 0x004) - 1
[2:    77253063]    runtime_pm: in
[2:    77253087]     task_push: JOB ID 15 (STATE 0x010) - 722 usec.
[0:    77253791]           irq: 0x8000
[0:    77253795]     task_done: JOB ID 15 (STATE 0x010) - 705 usec.
[0:    77254048]    runtime_pm: out
[2:    77254610]    task_alloc: JOB ID 15 (STATE 0x000) - free

Change-Id: I6d0a735f259f86ecaa90abba662ec49727460524
Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>