Use printk_ratelimit() in rtc code to avoid flooding the kernel log buffer
with errors.  Also use rtas_get_error_log_max() instead of duplicating it
in __fetch_rtas_last_error.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>