arm, at91: generate boot.bin file for all atmel SoC

generate the boot.bin file for all atmel SoC (arm920, arm926, armv7)

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
[fix subject]
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
index 7afe437..07db0bf 100644
--- a/scripts/Makefile.spl
+++ b/scripts/Makefile.spl
@@ -181,6 +181,10 @@
 endif
 endif
 
+ifeq ($(CONFIG_SYS_SOC),"at91")
+ALL-y	+= boot.bin
+endif
+
 all:	$(ALL-y)
 
 ifdef CONFIG_SAMSUNG