fix disable u-boot and initramfs hooks (#3470)

Close https://github.com/armbian/build/issues/3457

config/sources/families/jetson-nano.conf

@@ -1,11 +1,8 @@
 ARCH=arm64
 KERNEL_IMAGE_TYPE=Image
+BOOTCONFIG=none
 ATF_COMPILE="no"
 OFFSET=16
-BOOTDELAY=0
-BOOTBRANCH="tag:v2021.07"
-BOOTPATCHDIR="u-boot-rockchip64"
-UBOOT_TARGET_MAP=";;u-boot.bin"
 
 CPUMIN=504000
 CPUMAX=2132000
@@ -21,7 +18,6 @@ case $BRANCH in
 		BOOT_FDT_FILE="none"
 		SRC_CMDLINE='console=ttyS0,115200n8 console=tty0 tegraid=21.1.2.0.0 ddr_die=4096M@2048M section=512M memtype=0 vpr_resize usb_port_owner_info=0 lane_owner_info=0 emc_max_dvfs=0 touch_id=0@63 video=tegrafb debug_uartport=lsport,4 earlyprintk=uart8250-32bit,0x70006000 maxcpus=4 usbcore.old_scheme_first=1 lp0_vec=0x1000@0xff780000 core_edp_mv=1075 core_edp_ma=4000 tegra_fbmem=0x800000@0x92ca9000 is_hdmi_initialised=1 earlycon=uart8250,mmio32,0x70006000 fbcon=map:0'
 		MODULES_INITRD="jetson-nano-legacy"
-		BOOTCONFIG=none
 	;;
 
 	current)
@@ -51,6 +47,8 @@ write_uboot_platform()
 family_tweaks()
 {
 
+	install -m 755 $SRC/packages/blobs/jetson/jetson.sh $SDCARD/etc/initramfs-tools/hooks/jetson.sh
+
 	if [[ $BRANCH == legacy ]]; then
 		install -m 755 $SRC/packages/blobs/jetson/tegra21x_xusb_firmware $SDCARD/lib/firmware/tegra21x_xusb_firmware
 		install -m 755 $SRC/packages/blobs/jetson/asound.conf.tegrahda $SDCARD/etc/asound.conf.tegrahda