epiphany: Import kernel header
epiphany: Import kernel header

From devel branch

include/uapi/misc/epiphany.h

https://github.com/parallella/parallella-linux/blob/4ee628ea226ac441659a60f2a4ca6c2dc15048c2/include/uapi/misc/epiphany.h

Signed-off-by: Ola Jeppsson <793f970c52ded1276b9264c742f19d1888cbaf73@adapteva.com>

aolofsson/pal,parallella/pal,parallella/pal,parallella/pal,aolofsson/pal,parallella/pal,parallella/pal,aolofsson/pal,aolofsson/pal