ARM: rmobile: beacon: Remove duplicated for RZ/G2 M/N/H

Now that TARGET_BEACON_RZG2M can handle all the work that
was done with TARGET_BEACON_RZG2N and TARGET_BEACON_RZG2H,
remove them since they just create more duplicate code.

Signed-off-by: Adam Ford <aford173@gmail.com>
4 files changed