Don't try to pivot to new ramfs if already running on one This patch allows the sysup...

Don't try to pivot to new ramfs if already running on one This patch allows the sysupgrade script to continue with the upgrade if openwrt is already running on a ramfs. This allows the use of the sysupgrade script as an _installer_ when running from an iso image. A user could boot the system from a bootable cd and invoke sysupgrade -n <URL> to write an image to the hard disk or CF.

Signed-off-by: Vasilis Tsiligiannis <b_tsiligiannis@silverton.gr>
SVN-Revision: 15683