add ATH9000 M.2 WIFI driver

hc

2024-05-09 b9d5c334faa47a75f1f28e72d203fc0334e8471d

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BR2_xtensa=y
BR2_XTENSA_CUSTOM=y
BR2_XTENSA_LITTLE_ENDIAN=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_XTENSA_LX60_UCLIBC_STABLE=y