x86: Move link to use driver model for SCSI

As a demonstration of how to use SCSI with driver model, move link over
to use this. This patch needs more work, but illustrates the concept.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/chromebox_panther_defconfig b/configs/chromebox_panther_defconfig
index 51a934f..30d4019 100644
--- a/configs/chromebox_panther_defconfig
+++ b/configs/chromebox_panther_defconfig
@@ -37,6 +37,8 @@
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
 CONFIG_SCSI=y
+CONFIG_DM_SCSI=y
+CONFIG_BLK=y
 CONFIG_CROS_EC=y
 CONFIG_CROS_EC_LPC=y
 CONFIG_SPI_FLASH=y