Ability to log performance makers to ftrace for Tizen SPI tool

Ability to log performance makers to ftrace for Tizen SPI tool

[Issue] N/A

[Problem]
When using ftrace to analyse what the system is doing there is no way to see
what task Dali is doing. E.g. when does it start running its update-thread
in relation to the V-SYNC and event processing.

[Cause] No code

[Solution]

Added extra bitmask option to DALI_LOG_PERFORMANCE environment variable,
Example:

DALI_LOG_PERFORMANCE=4 dali-demo

cat /sys/kernel/debug/tracing/trace

 TASK-PID    CPU#    TIMESTAMP  FUNCTION

  <...>-28189 [001] 269275.222762: tracing_mark_write: SPI_EV_DALI_PROCESS_EVENT_START
  <...>-28189 [001] 269275.222812: tracing_mark_write: SPI_EV_DALI_PROCESS_EVENT_END
  <...>-28196 [000] 269275.239498: tracing_mark_write: SPI_EV_DALI_V_SYNC
  <...>-28194 [005] 269275.239527: tracing_mark_write: SPI_EV_DALI_UPDATE_START
  <...>-28194 [005] 269275.240401: tracing_mark_write: SPI_EV_DALI_UPDATE_END
  <...>-28196 [000] 269275.256192: tracing_mark_write: SPI_EV_DALI_V_SYNC
  <...>-28194 [005] 269275.256228: tracing_mark_write: SPI_EV_DALI_UPDATE_START
  <...>-28194 [005] 269275.256330: tracing_mark_write: SPI_EV_DALI_UPDATE_END

The SPI_EV_ prefix is added to allow SPI tool to detect the markers.

Change-Id: Idec9714308aa19a9f1ef509057f6ba7d227c4649