Revert "Revert "artik530: bump to ZigBee firmware version to 5.7.4 GA build 99 xNCP 0x6""
Revert "Revert "artik530: bump to ZigBee firmware version to 5.7.4 GA build 99 xNCP 0x6""

This reverts commit 417fc6db3b8d3eb315da46412360e726189aef2e.

Change-Id: I6765e880e1e5c6b6789adeba24091a45b3ec45a5

SamsungARTIK/build-artik