brcm47xx: image: prepare for using mips74k subtarget

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 41528

target/linux/brcm47xx/image/Makefile

@@ -163,6 +163,26 @@ define Image/Build/generic/squashfs
 	$(call Image/Build/generic/jffs2-128k,$(1))
 endef
 
+#################################################
+# Subtarget mips74k
+#################################################
+
+# $(1): filesystem type.
+define Image/Build/mips74k/jffs2-64k
+	$(call Image/Build/mips74k/devices-with-64k-blocks,$(1))
+endef
+
+# $(1): filesystem type.
+define Image/Build/mips74k/jffs2-128k
+	$(call Image/Build/mips74k/devices-with-128k-blocks,$(1))
+endef
+
+# $(1): filesystem type.
+define Image/Build/mips74k/squashfs
+	$(call Image/Build/mips74k/devices-with-64k-blocks,$(1))
+	$(call Image/Build/mips74k/devices-with-128k-blocks,$(1))
+endef
+
 #################################################
 # Shared BuildImage defines
 #################################################