drivers/clk/hisilicon/clk-hi3559a.c:817: undefined reference to `hisi_reset_exit' drivers/clk/hisilicon/clk-hi3559a.c:799: undefined reference to `hisi_reset_init' arm-linux-gnueabi-ld: drivers/clk/hisilicon/clk-hi3559a.c:805: undefined reference to `hisi_reset_exit'