linux-ti-staging: Add dra7xx-evm support
linux-ti-staging: Add dra7xx-evm support

* Add the DTB entries for the dra7xx-evm machine type
* Update to the latest git sources which have dra7xx-evm support.
* Update the PV to match the latest source version

Signed-off-by: Chase Maupin <5a5662f468a76e0fc4391e65fb9f536df44d7380@ti.com>
Signed-off-by: Denys Dmytriyenko <d29de71aea38aad3a87d486929cb0aad173ae612@ti.com>

tylerwhall/meta-ti,jumpnow/meta-ti,joelagnel/meta-ti,joelagnel/meta-ti,jumpnow/meta-ti,rcn-ee/meta-ti,tylerwhall/meta-ti,rcn-ee/meta-ti,rcn-ee/meta-ti,smoosvi/Test4,joelagnel/meta-ti,tylerwhall/meta-ti,smoosvi/Test4,joelagnel/meta-ti,RedFIR/meta-ti,RedFIR/meta-ti,rcn-ee/meta-ti,tylerwhall/meta-ti,RedFIR/meta-ti,RedFIR/meta-ti