ARM: 9449/1: coresight: Finish removal of Coresight support in arch/arm/kernel

Commit 184901a ("ARM: removing support for etb/etm in
"arch/arm/kernel/"") removed asm/hardware/coresight.h which is included
by this file. Therefore this is dead code so delete it.

Acked-by: Suzuki K Poulose <[email protected]>
Signed-off-by: James Clark <[email protected]>
Signed-off-by: Russell King (Oracle) <[email protected]>

Author: james-c-linaro