x86: kconfig: Select PCI and DM_PCI

PCI is the de facto interconnect bus in an x86 system.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

configs/som-db5800-som-6867_defconfig

@@ -52,7 +52,6 @@ CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_DM_ETH=y
 CONFIG_E1000=y
-CONFIG_DM_PCI=y
 CONFIG_DM_RTC=y
 CONFIG_DEBUG_UART_BASE=0x3f8
 CONFIG_DEBUG_UART_CLOCK=1843200

configs/theadorable-x86-dfi-bt700_defconfig

@@ -59,7 +59,6 @@ CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_DM_ETH=y
 CONFIG_E1000=y
-CONFIG_DM_PCI=y
 CONFIG_DM_RTC=y
 CONFIG_SYS_NS16550=y
 CONFIG_ICH_SPI=y

drivers/pci/Kconfig

 menuconfig PCI
 	bool "PCI support"
-	default y if PPC || X86
+	default y if PPC
 	help
 	  Enable support for PCI (Peripheral Interconnect Bus), a type of bus
 	  used on some devices to allow the CPU to communicate with its