想更新一下香蕉派的内核，但是编译的时候出现这样的错误，有大神指导怎么解决吗？
make[2]: *** No rule to make target ‘arch/arm/boot/dts/sun7i-a20-bananapi.dtb’, needed by ‘__build’. Stop.
make[2]: *** Waiting for unfinished jobs…
DTC arch/arm/boot/dts/sun6i-a31s-cs908.dtb
CC kernel/elfcore.o
CC kernel/irq_work.o
/home/bananapi/sources/BPI-Kernel4.0/linux-4.0.2/arch/arm/Makefile:319: recipe for target ‘dtbs’ failed
make[1]: *** [dtbs] Error 2
make[1]: *** Waiting for unfinished jobs…
内核源码是这里下的：
https://github.com/BPI-SINOVOIP/BPI-Kernel4.0.git