[oe] Changing u-boot-omap3 provider

[Elvis Dowson]

Hi,
      When I'm building omap3-console-image for the overo, it uses the u-boot-omap3_git.bb recipe. 

What should I change to make it take a u-boot-omap3-overo_2010.06.bb recipe located in my user.collection folder?

Best regards,

Elvis