disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/arch/powerpc/configs/mpc866_ads_defconfig
..
..
@@ -12,7 +12,6 @@
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 # CONFIG_BLK_DEV_BSG is not set
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 CONFIG_PARTITION_ADVANCED=y
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 CONFIG_MPC86XADS=y
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-CONFIG_8xx_COPYBACK=y
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 CONFIG_GEN_RTC=y
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 CONFIG_HZ_1000=y
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 CONFIG_MATH_EMULATION=y