kbuild: move Kai Germaschewski to CREDITS

Kai is not active in kernel development these
days so give him credit for his major kbuild
contribution and ISDN work.

Acked-by: Kai Germaschewski <kai@germaschewski.name>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/CREDITS b/CREDITS
index 550bb2b..86a0bb2 100644
--- a/CREDITS
+++ b/CREDITS
@@ -1165,6 +1165,12 @@
 S: Carnegie, Pennsylvania 15106-4304
 S: USA
 
+N: Kai Germaschewski
+E: kai@germaschewski.name
+D: Major kbuild rework during the 2.5 cycle
+D: ISDN Maintainer
+S: USA
+
 N: Philip Gladstone
 E: philip@gladstonefamily.net
 D: Kernel / timekeeping stuff