x86: Switch all boards to use DM SCSI

After MMC is converted to DM, convert to use DM SCSI as well for all
x86 boards and imply BLK for both MMC and SCSI drivers.

CONFIG_SCSI_DEV_LIST is no longer used. Clean them up.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/queensbay/Kconfig b/arch/x86/cpu/queensbay/Kconfig
index 80b6bc5..d1b04c9 100644
--- a/arch/x86/cpu/queensbay/Kconfig
+++ b/arch/x86/cpu/queensbay/Kconfig
@@ -10,6 +10,7 @@
 	select HAVE_CMC
 	select ARCH_EARLY_INIT_R
 	imply ENV_IS_IN_SPI_FLASH
+	imply AHCI_PCI
 	imply ICH_SPI
 	imply INTEL_ICH6_GPIO
 	imply MMC