meta-bletchley: power-ctrl: increase power off button delay to 10 seconds

In latest host OS version, it requires holding power button al least 10
seconds to perform force power off.

Increase the delay time to meet requirements.

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: I99a5e4117dcc1ce78c886f7170b8c2a1f984b8e4
diff --git a/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/power-ctrl b/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/power-ctrl
index 232b6f3..5fe14db 100755
--- a/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/power-ctrl
+++ b/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/power-ctrl
@@ -10,7 +10,7 @@
 source /usr/libexec/bletchley-common-functions
 
 DELAY_POWER_ON="0.5"
-DELAY_POWER_OFF="5"
+DELAY_POWER_OFF="10"
 DELAY_POWER_RECOVERY_MODE="10"
 POWER_BTN_TIMEOUT_SEC=10