firmware: arm_scmi: Remove superfluous handle_to_scmi_info

Variable info is already defined in the outer code block and there is no
need to define the same again in the inner code block. Let us just remove
that duplicate definition of the variable info. No functional change.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Luke Parkin <luke.parkin@arm.com>
Message-Id: <20240805131013.587016-2-sudeep.holla@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>