tile: refresh tile defconfig files

These are based on the current shipping versions of the config files
from Tilera, as synced up to the tip, so are a better starting point
for folks who want a default configuration.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

diff --cc arch/tile/configs/tilegx_defconfig
Simple merge

diff --cc arch/tile/configs/tilepro_defconfig
Simple merge