Documentation/x86/boot.txt: payload length was changed to payload_length

Signed-off-by: Baodong Chen <[email]chenbdchenbd@gmail.com[email]>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
1 file changed