coresight: use dev_err_ratelimited for byte counter overflow message

When byte counter feature is enabled, if the rate at which we receive IRQs
is so high that userspace is unable to read the data fast enough, we
throw byte counter overflow error message. However these messages can cause
log spew resulting in watchdog bark/bite. Limit byte counter overflow
message spew by using rate limited function.

Change-Id: I714323893330368965f70a137aaef7ef7cd4029d
Signed-off-by: Sarang Joshi <spjoshi@codeaurora.org>