This moves the Meraki MR12 and Meraki MR16 to the new generic target.
Tested and verified working on both devices.
Note that kernel/rootfs images are still generated. This is because they
are used for the inital flashing process due to the fun pace at which
UBoot erases/writes to SPI.
Signed-off-by: Chris Blake <chrisrblake93@gmail.com>
d8662ac3c6