i2c: at91: Use dev_err_probe() instead of dev_err()

Change
if (IS_ERR(x)) { dev_err(...); return PTR_ERR(x); }
into
return dev_err_probe()

Also, return the correct error instead of hardcoding -ENODEV
This change has also the advantage of handling the -EPROBE_DEFER situation.

Signed-off-by: Yann Sionneau <yann@sionneau.net>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>