omap4430-panda: Prefer u-boot-git and remove extra custom x-load
omap4430-panda: Prefer u-boot-git and remove extra custom x-load

* Switch to using u-boot-git (instead of u-boot-sakoman)
   * Remove reference to custom x-load
   * Remove extra image depends (which will come from common include)

Signed-off-by: Roger Monk <d23a2d7364ff5b9274b46f5bc00c2488a2111ac3@ti.com>
Signed-off-by: Koen Kooi <aeb23945acf582c79fe8e7da695ed6eac02acbbd@ti.com>

mrchapp/arago-oe-dev,nx111/openembeded_openpli2.1_nx111,sampov2/audio-openembedded,nx111/openembeded_openpli2.1_nx111,sledz/oe,sledz/oe,dave-billin/overo-ui-moos-auv,sampov2/audio-openembedded,mrchapp/arago-oe-dev,BlackPole/bp-openembedded,dave-billin/overo-ui-moos-auv,nx111/openembeded_openpli2.1_nx111,SIFTeam/openembedded,sampov2/audio-openembedded,dave-billin/overo-ui-moos-auv,mrchapp/arago-oe-dev,nx111/openembeded_openpli2.1_nx111,mrchapp/arago-oe-dev,SIFTeam/openembedded,BlackPole/bp-openembedded,sampov2/audio-openembedded,sampov2/audio-openembedded,sampov2/audio-openembedded,sledz/oe,nx111/openembeded_openpli2.1_nx111,BlackPole/bp-openembedded,dave-billin/overo-ui-moos-auv,sledz/oe,SIFTeam/openembedded,sledz/oe,SIFTeam/openembedded,SIFTeam/openembedded,dave-billin/overo-ui-moos-auv,SIFTeam/openembedded,sampov2/audio-openembedded,SIFTeam/openembedded,sledz/oe,mrchapp/arago-oe-dev,dave-billin/overo-ui-moos-auv,mrchapp/arago-oe-dev,BlackPole/bp-openembedded,dave-billin/overo-ui-moos-auv,sledz/oe,BlackPole/bp-openembedded,nx111/openembeded_openpli2.1_nx111,nx111/openembeded_openpli2.1_nx111,BlackPole/bp-openembedded,BlackPole/bp-openembedded,mrchapp/arago-oe-dev,nx111/openembeded_openpli2.1_nx111