usb rootfs needs filesystem ext4 to boot

package/fwinstall/Makefile

@@ -10,7 +10,6 @@ PKG_DESCR:=		disk/flash installer
 PKG_SECTION:=		base/adk
 PKG_DEPENDS:=		mke2fs parted sfdisk dosfstools mksh
 PKG_DEPENDS+=		grub grub-tools
-PKG_KDEPENDS:=		ext4-fs
 
 NO_DISTFILES:=		1
 

target/config/Config.in.rootfs

@@ -109,7 +109,8 @@ config ADK_TARGET_ROOTFS_NFSROOT
 
 config ADK_TARGET_ROOTFS_USB
 	bool "Boot from USB stick"
-	select ADK_LINUX_KERNEL_NLS if ADK_TARGET_OS_LINUX
+	select ADK_LINUX_KERNEL_EXT4_FS if ADK_TARGET_OS_LINUX
+	select ADK_LINUX_KERNEL_SCSI if ADK_TARGET_OS_LINUX
 	select ADK_LINUX_KERNEL_SCSI if ADK_TARGET_OS_LINUX
 	select ADK_LINUX_KERNEL_BLK_DEV_SD if ADK_TARGET_OS_LINUX
 	select ADK_LINUX_KERNEL_USB if ADK_TARGET_OS_LINUX
@@ -117,7 +118,7 @@ config ADK_TARGET_ROOTFS_USB
 	select ADK_LINUX_KERNEL_USB_OHCI_HCD if ADK_TARGET_OS_LINUX
 	select ADK_LINUX_KERNEL_USB_UHCI_HCD if ADK_TARGET_OS_LINUX
 	select ADK_LINUX_KERNEL_USB_STORAGE if ADK_TARGET_OS_LINUX
-	select ADK_PACKAGE_ADKINSTALL
+	select ADK_PACKAGE_FWINSTALL
 	depends on ADK_TARGET_WITH_USB_BOOT \
 		|| ADK_TARGET_GENERIC
 	help