configs: rename a bunch of friendlyarm boards

configs: rename a bunch of friendlyarm boards

We have defconfigs for quite a few friendlyarm boards, but the
naming for the defconfigs for those boards is inconsistent: some
start with 'friendlyarm_' while others don't.

Although the number of boards starting with 'friendlyarm_' is
less than those which do not, we still choose to rename the
boards so all have the 'friendlyarm_' prefix.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Chakra Divi <chakra@openedev.com>
Cc: Davide Viti <zinosat@gmail.com>
Cc: Marek Belisko <marek.belisko@open-nandra.com>
Cc: Suniel Mahesh <sunil@amarulasolutions.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>