MAKEALL: Added missing pb1000 board

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
diff --git a/MAKEALL b/MAKEALL
index 20e8137..20ef4e1 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -554,6 +554,7 @@
 
 LIST_au1xx0_el="	\
 	dbau1550_el	\
+	pb1000		\
 "
 
 LIST_mips_el="			\