kexec: fix a minor mistake in an error message

when specified a wrong --entry option, it outputs the error message:
    "Bad option value in --load-jump-back-helper=%s\n"
which is obviously wrong, it should be:
    "Bad option value in --entry=%s\n"

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