coresight: etm3x: making error message unambiguous

By adding the function name at the beginning of the error
message there is no doubt as to where the failing condition
occurred.

Change-Id: I516a873275bb071e89bbdf27d394208db4eb6461
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: af6162155e943dfc7dc2c45507e39cc4d60d5812
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Shashank Mittal <mittals@codeaurora.org>