task-opie: reverse default display width/height
task-opie: reverse default display width/height

240x320 is a more appropriate default screen size for a typical Opie
target PDA device.

Signed-off-by: Paul Eggleton <737d4dae46a541673d7bf4e0d5b32714b16528d8@linux.intel.com>

bluelightning/meta-opie,bluelightning/meta-opie,bluelightning/meta-opie,bluelightning/meta-opie,bluelightning/meta-opie