cpuat91: fix board support

- fix board support following relocation changes
- switch to boards.cfg
- disable i2c to keep size under 128kiB (1 sector)

Signed-off-by: Eric BĂ©nard <eric@eukrea.com>
diff --git a/boards.cfg b/boards.cfg
index 0f7daf5..2f681ae 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -52,6 +52,8 @@
 at91rm9200ek                 arm         arm920t     at91rm9200ek        atmel          at91        at91rm9200ek
 at91rm9200ek_ram             arm         arm920t     at91rm9200ek        atmel          at91        at91rm9200ek:RAMBOOT
 eb_cpux9k2                   arm         arm920t     -                   BuS            at91
+cpuat91                      arm         arm920t     cpuat91             eukrea         at91        cpuat91
+cpuat91_ram                  arm         arm920t     cpuat91             eukrea         at91        cpuat91:RAMBOOT
 cmc_pu2                      arm         arm920t     -                   -              at91rm9200
 csb637                       arm         arm920t     -                   -              at91rm9200
 kb9202                       arm         arm920t     -                   -              at91rm9200