update .gitignore

hc

2024-03-26 e9199a72d842cbda78ac614eee5db7cdaa6f2530

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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