make[1]: ***没有规则来制定目标的固件/am335x-pm-固件。本”,需要“固件/ am335x-pm-firmware.bin.gen.o’。停止

I have a Ti Sitara AM335x Starter Kit and I want to use USB 3G-Modem on it. I am following these documents:I have a Ti Sitara AM335x Starter Kit and I wan