beaglebone: enable the nowayout option for the watchdog

beaglebone: enable the nowayout option for the watchdog

Bumping the meta SRCREV for the following fix:

[
  The default watchdog behaviour is to stop the timer if the process
  managing it closes the file /dev/watchdog. The system would not reboot
  if watchdog daemon crashes due to a bug in it or get killed by other
  malicious code. So we prefer to enable nowayout option for the
  watchdong. With this enabled, there is no way of disabling the watchdog
  once it has been started. This option is also enabled in the predecessor
  of this BSP (beagleboard)
]

[YOCTO: 3937]

(From OE-Core rev: 7006412c285a4a6c75d5349f60dc71b0b735ff90)

Signed-off-by: Kevin Hao <kexin.hao@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>