x86: kconfig: Let board select BOARD_EARLY_INIT_F

CONFIG_BOARD_EARLY_INIT_F literally indicates board-specific codes
and should be not 'default y' for all x86 boards.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/intel/cougarcanyon2/Kconfig b/board/intel/cougarcanyon2/Kconfig
index 95a617b..4e7d021 100644
--- a/board/intel/cougarcanyon2/Kconfig
+++ b/board/intel/cougarcanyon2/Kconfig
@@ -21,5 +21,6 @@
 	select NORTHBRIDGE_INTEL_IVYBRIDGE
 	select HAVE_FSP
 	select BOARD_ROMSIZE_KB_2048
+	select BOARD_EARLY_INIT_F
 
 endif