SoC c3 : scripts : add uboot package function. [2/2]

PD#SH-19850

Problem:
Need to optimize the compilation script and add uboot package function.

Solution:
add uboot package function.

Verify:
N/A

Change-Id: I74f83f30985457955bced9084450155e6846054b
Signed-off-by: yongbing.he <yongbing.he@amlogic.com>
diff --git a/gen_fastboot.sh b/gen_fastboot.sh
index 807e402..cc63388 100755
--- a/gen_fastboot.sh
+++ b/gen_fastboot.sh
@@ -8,6 +8,12 @@
 #RTOS root directory
 RTOS_BASE_DIR=$(realpath $(dirname $(readlink -f ${BASH_SOURCE[0]:-$0}))/..)
 
+RTOS_TARGET_ADDRESS=0x2200000
+BOARD_TYPE=aw402_c302x
+SENSOR_TYPE=SC301IOT
+DDR_SIZE=128m
+UBOOT_CFG=c3_aw402
+
 while [[ $# -gt 0 ]]; do
     case "$1" in
     -a | --address)