xorg-xserver-config: Disable screen blanking for qemu images

xorg-xserver-config: Disable screen blanking for qemu images

Disable BlankTime, StandbyTime, SuspendTime and OffTime in X default for QEMU images

This fix addresses the issue of Xserver screensaver blanking being enabled on QEMU images by
disabling BlankTime, StandbyTime, SuspendTime, and OffTime in the Xorg default settings for QEMU images.

Reference : https://www.x.org/archive/X11R6.8.0/doc/xorg.conf.5.html

[YOCTO #15436]

Reported-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: K Sanjay Nayak <nayakksanjay@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>