u-boot-fw-utils: Remove bbappend
u-boot-fw-utils: Remove bbappend

The OE-Core project now make use of libubootenv which is board
independent.

The bbappend was just to provide a out-of-box working build.

Signed-off-by: Otavio Salvador <1d31b11c1b92bf5d043d36edfe7174db39a6b891@ossystems.com.br>

UpdateHub/meta-updatehub,UpdateHub/meta-updatehub,UpdateHub/meta-updatehub