UPSTREAM: coresight: tmc-etb/etf: Prepare to handle errors enabling

Prepare to handle errors in enabling the hardware and
report it back to the core driver.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

(Upstream commit 1d364034aaf2fcc7bc23cac2ffde52747376337e).

Bug: 140266694
Change-Id: Ic86a6dd1911b98f557063e1875279d13324566e5
Signed-off-by: Yabin Cui <yabinc@google.com>