x86: crownbay: Enable SeaBIOS support

Enable SeaBIOS support for any kernel that requires legacy BIOS
services.

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

configs/crownbay_defconfig

@@ -12,6 +12,7 @@ CONFIG_DISABLE_IGD=y
 CONFIG_SMP=y
 CONFIG_GENERATE_PIRQ_TABLE=y
 CONFIG_GENERATE_MP_TABLE=y
+CONFIG_SEABIOS=y
 CONFIG_FIT=y
 CONFIG_SHOW_BOOT_PROGRESS=y
 CONFIG_USE_BOOTARGS=y