bcm27xx: label to boot partition

Get fat partition name allow easy partition identification
for user.

Signed-off-by: Andrey Kunitsyn <blackicebox@gmail.com>

target/linux/bcm27xx/image/Makefile

@@ -18,7 +18,7 @@ endef
 ### Image scripts ###
 define Build/boot-common
 	rm -f $@.boot
-	mkfs.fat -C $@.boot $(FAT32_BLOCKS)
+	mkfs.fat -n boot -C $@.boot $(FAT32_BLOCKS)
 	mcopy -i $@.boot $(KDIR)/COPYING.linux ::
 	mcopy -i $@.boot $(KDIR)/LICENCE.broadcom ::
 	mcopy -i $@.boot cmdline.txt ::