arm64: defconfig: Add Coresight as module

Add Coresight to defconfig so that build errors are caught.
CONFIG_CORESIGHT_SOURCE_ETM4X is excluded because it depends on
CONFIG_PID_IN_CONTEXTIDR which has a performance cost.

Signed-off-by: James Clark <james.clark@arm.com>
Link: https://lore.kernel.org/r/20220922142400.478815-2-james.clark@arm.com


Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>