[display] Power up display when never-blank mode is enabled. JB#37393
[display] Power up display when never-blank mode is enabled. JB#37393

Logically it should be so that the display is always on when never-blank
mode is in enabled state. However, when never-blank mode is activated
while display is off, display stays off.

Issue display on request when never-blank mode is changed from disabled
to enabled.

Signed-off-by: Simo Piiroinen <6d5e5360bed3d486f7d9fb26b0f737f7d4fd45ee@jollamobile.com>

spiiroin/mce,spiiroin/mce,spiiroin/mce,spiiroin/mce