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A new header fch.h was created to store registers used by different AMD drivers. This header was included by i2c-piix4 in commit624b0d5696("i2c: piix4, x86/platform: Move the SB800 PIIX4 FCH definitions to <asm/amd/fch.h>"). To prevent compile failures on non-x86 archs i2c-piix4 was set to only compile on x86 by commit7e173eb82a("i2c: piix4: Make CONFIG_I2C_PIIX4 dependent on CONFIG_X86"). This was not a good decision because loongarch and mips both actually support i2c-piix4 and set it enabled in the defconfig. Move the header to a location accessible by all architectures. Fixes:624b0d5696("i2c: piix4, x86/platform: Move the SB800 PIIX4 FCH definitions to <asm/amd/fch.h>") Suggested-by: Hans de Goede <hansg@kernel.org> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Reviewed-by: Hans de Goede <hansg@kernel.org> Link: https://lore.kernel.org/r/20250610205817.3912944-1-superm1@kernel.org Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>