coresight: cti: Reduce scope for the variable 'cs_fwnode' in cti_plat_create_connection()

coresight: cti: Reduce scope for the variable 'cs_fwnode' in cti_plat_create_connection()

A local variable was used only within an else branch.
Thus move the definition for the variable “cs_fwnode” into
the corresponding code block.

This issue was detected by using the Coccinelle software.

Link: https://lore.kernel.org/r/c1b09b27-9012-324f-28d0-ba820dc468a5@web.de
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210201181351.1475223-2-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>