x86: coreboot: Scan PCI after relocation

Enable this so that PCI devices can be used correctly without needing
to do a manual scan.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/coreboot_defconfig b/configs/coreboot_defconfig
index fb4d175..1bbb358 100644
--- a/configs/coreboot_defconfig
+++ b/configs/coreboot_defconfig
@@ -18,6 +18,7 @@
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_LAST_STAGE_INIT=y
+CONFIG_PCI_INIT_R=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PBSIZE=532
 CONFIG_CMD_IDE=y