u-boot-ti-staging: update with am57x/x15 and config fixes
u-boot-ti-staging: update with am57x/x15 and config fixes

Signed-off-by: Denys Dmytriyenko <d29de71aea38aad3a87d486929cb0aad173ae612@ti.com>
Acked-by: Franklin Cooper Jr. <b8c01a1703dc362919183054a071c1f348818c23@ti.com>

rcn-ee/meta-ti,rcn-ee/meta-ti,joelagnel/meta-ti,RedFIR/meta-ti,joelagnel/meta-ti,joelagnel/meta-ti,RedFIR/meta-ti,joelagnel/meta-ti,rcn-ee/meta-ti,RedFIR/meta-ti,tylerwhall/meta-ti,RedFIR/meta-ti,tylerwhall/meta-ti,tylerwhall/meta-ti,tylerwhall/meta-ti,rcn-ee/meta-ti