Linux 2.6.22-rc7

Last -rc? That's the plan..
diff --git a/Makefile b/Makefile
index 8a3c271..c6f7b71 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 22
-EXTRAVERSION = -rc6
+EXTRAVERSION = -rc7
 NAME = Holy Dancing Manatees, Batman!
 
 # *DOCUMENTATION*