u-boot-omap3: update default environment variables for DSS2
u-boot-omap3: update default environment variables for DSS2

nzjrs/overo-openembedded,scottellis/overo-oe,nzjrs/overo-openembedded,John-NY/overo-oe,scottellis/overo-oe,yyli/overo-oe,John-NY/overo-oe,scottellis/overo-oe,John-NY/overo-oe,John-NY/overo-oe,John-NY/overo-oe,scottellis/overo-oe,scottellis/overo-oe,yyli/overo-oe,yyli/overo-oe,yyli/overo-oe,John-NY/overo-oe,nzjrs/overo-openembedded,nzjrs/overo-openembedded,yyli/overo-oe,John-NY/overo-oe,scottellis/overo-oe,yyli/overo-oe,nzjrs/overo-openembedded,nzjrs/overo-openembedded,yyli/overo-oe,yyli/overo-oe,nzjrs/overo-openembedded,scottellis/overo-oe