Fix one remaining user of system_rev. This patch is needed for
3430SDP ES2 to boot after
4a4ada55c1bdaa2b9fd1293611b55ceba14b13e7.
Bisected by Timo-Pekka Launonen's <ext-timo-pekka.launonen@nokia.com>
list robot.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Timo-Pekka Launonen <ext-timo-pekka.launonen@nokia.com>
Cc: Lauri Leukkunen <lauri.leukkunen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>