i2c: piix4: Make CONFIG_I2C_PIIX4 dependent on CONFIG_X86

PIIX4 and compatible controllers are only for X86. As some headers are
being moved into x86 specific headers PIIX4 won't compile on non-x86.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Andi Shyti <andi.shyti@kernel.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Sanket Goswami <Sanket.Goswami@amd.com>
Cc: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Cc: Yazen Ghannam <yazen.ghannam@amd.com>
Cc: linux-i2c@vger.kernel.org
Link: https://lore.kernel.org/r/20250422234830.2840784-3-superm1@kernel.org

Author: superm1

drivers/i2c/busses/Kconfig

@@ -200,7 +200,7 @@ config I2C_ISMT
 
 config I2C_PIIX4
 	tristate "Intel PIIX4 and compatible (ATI/AMD/Serverworks/Broadcom/SMSC)"
-	depends on PCI && HAS_IOPORT
+	depends on PCI && HAS_IOPORT && X86
 	select I2C_SMBUS
 	help
 	  If you say yes to this option, support will be included for the Intel