scsi: Move drivers into new drivers/scsi directory

At present we have the SCSI drivers in the drivers/block and common/
directories. It is better to split them out into their own place. Use
drivers/scsi which is what Linux does.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
new file mode 100644
index 0000000..9e23699
--- /dev/null
+++ b/drivers/scsi/Makefile
@@ -0,0 +1,20 @@
+#
+# (C) Copyright 2000-2007
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+ifndef CONFIG_SPL_BUILD
+obj-$(CONFIG_DM_SCSI) += scsi-uclass.o
+obj-$(CONFIG_SCSI) += scsi.o
+endif
+
+ifdef CONFIG_SPL_BUILD
+ifdef CONFIG_SPL_SATA_SUPPORT
+obj-$(CONFIG_DM_SCSI) += scsi-uclass.o
+obj-$(CONFIG_SCSI) += scsi.o
+endif
+endif
+
+obj-$(CONFIG_SANDBOX) += sandbox_scsi.o