d2: Disable standalone power collapse

 * This is causing Krait watchdog timeouts. Other Krait devices such as
   Mako experience the same failure.
 * Disable it (same as stock) to stop the crashes and allow me to sleep again.

Change-Id: I2db4525b4271b5d762a537bc785f3344e5fa9be2
Revert "msm_fb: display: allow backlight update after first update"

Fixes the dim backlight in recovery.

This reverts commit 1ec31c7716a7647cbedf26f4f820dbaa0c19a2b0.