[PATCH] powerpc: fix kernel version display on pseries boxes

We are displaying the wrong thing on the operator panel (2x40
character LCD).  This got broken in commit cebb21b5, when UTS_RELEASE
got changed to system_utsname.version.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>