add nfsroot support for rpi

target/arm/Makefile

@@ -44,10 +44,10 @@ kernel-install:
 		-n foxg20 $(KERNEL) $(MAKE_TRACE)
 
 ifeq ($(ADK_TARGET_FS),nfsroot)
-imageinstall: kernel-install ${FW_DIR}/${ROOTFSUSERTARBALL}
+imageinstall: ${FW_DIR}/${ROOTFSUSERTARBALL}
 	@cp $(KERNEL) $(FW_DIR)/$(TARGET_KERNEL)
-	@echo 'Type dhcp via u-boot prompt to load kernel'
-	@echo 'After that type bootm to load the kernel'
+	@echo 'The kernel file is: $(FW_DIR)/${TARGET_KERNEL}'
+	@echo 'The nfs root tarball is: ${FW_DIR}/${ROOTFSUSERTARBALL}'
 endif
 ifeq ($(ADK_TARGET_FS),archive)
 ifeq ($(ADK_TARGET_SYSTEM_CUBOX_I),y)

target/config/Config.in

@@ -637,7 +637,6 @@ config ADK_TARGET_ROOTFS_NFSROOT
 	select ADK_KERNEL_IP_PNP
 	select ADK_KERNEL_IP_PNP_DHCP
 	depends on !ADK_HARDWARE_QEMU && !ADK_HARDWARE_VBOX && !ADK_TARGET_SYSTEM_ARANYM_M68K
-	depends on !ADK_TARGET_SYSTEM_RASPBERRY_PI
 	depends on !ADK_TARGET_SYSTEM_ARM_FM
 	help
 	  Root filesystem mounted via NFS. (DHCP)