disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

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# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_RK_HEADSET)        += rockchip_headset_core.o rk_headset.o rk_headset_irq_hook_adc.o