coresight: Remove unused function parameter

mainline inclusion
from mainline-v6.1-rc1
commit 3727f03e
category: cleanup
bugzilla: https://gitee.com/openeuler/kernel/issues/I6XLGY
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3727f03e2bc63de56fd00acb8846393106318156



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The ability to use a custom function in this sysfs show function isn't
used so remove it.

No functional changes.

Signed-off-by: James Clark <james.clark@arm.com>
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Link: https://lore.kernel.org/r/20220830172614.340962-2-james.clark@arm.com


Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: huangfangrun <huangfangrun1@h-partners.com>