soc: Use DEVICE_NOOP macro formalism over static stub func

Change-Id: Ice7e27230010ffc48948f952394e849533f94085
Signed-off-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Reviewed-on: http://review.coreboot.org/8989
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
2 files changed