Bump cirrus driver and set default depth to 16 bpp

Current xf86-video-cirrus X11 driver does not work with Qemu emulated
GD5446 graphics adapter (on Linux Qemu v2.6.2 at least) - opening
terminal results in distorted, visally unstable window.

This is now fixed with setting default depth to 16 bpp (was 24 bpp).

Also the driver was bumped to version 1.5.3 and `NoAccel` set as a
default. All changes are from upstream. Two OpenIndiana-specific
patches were updated.

Tested with current OpenIndiana on Linux Qemu KVM v2.8.0 with `-vga
cirrus`.