arm: mach-k3: Move K3 degenerate keys out of board folder

This file is common for all of K3, move it out of board/ directory and
into mach-k3. And change the relative paths to absolute paths in the
binman paths.

While at it, drop the reference in verdin-binman file which is
redundant.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Andrew Davis <afd@ti.com>
3 files changed