kexec: cleanup: make add_backup_segments static

The function add_backup_segments is only called by my_load and
they are in the same file. So unnecessary to export it. Make it
static.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2 files changed