UPSTREAM: coresight: Use ERR_CAST instead of ERR_PTR

Use ERR_CAT inlined function to replace the ERR_PTR(PTR_ERR). It
make the code more concise.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

(Upstream commit bbd35ba6fab5419e58e96f35f1431f13bdc14f98).

Bug: 140266694
Change-Id: I0556f3a4f75175c96498665d5f47060b9a9b14d1
Signed-off-by: Yabin Cui <yabinc@google.com>