ZEN: Add VHBA driver

remote https://github.com/cdemu/cdemu
tag    vhba-module-20211218

drivers/scsi/Kconfig

@@ -1524,4 +1524,6 @@ endif # SCSI_LOWLEVEL
 
 source "drivers/scsi/device_handler/Kconfig"
 
+source "drivers/scsi/vhba/Kconfig"
+
 endmenu

drivers/scsi/Makefile

@@ -151,6 +151,7 @@ obj-$(CONFIG_CHR_DEV_SCH)	+= ch.o
 obj-$(CONFIG_SCSI_ENCLOSURE)	+= ses.o
 
 obj-$(CONFIG_SCSI_HISI_SAS) += hisi_sas/
+obj-$(CONFIG_VHBA)		+= vhba/
 
 # This goes last, so that "real" scsi devices probe earlier
 obj-$(CONFIG_SCSI_DEBUG)	+= scsi_debug.o

drivers/scsi/vhba/Kconfig

@@ -0,0 +1,9 @@
+config VHBA
+	tristate "Virtual (SCSI) Host Bus Adapter"
+	depends on SCSI
+	help
+	  This is the in-kernel part of CDEmu, a CD/DVD-ROM device
+	  emulator.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called vhba.

drivers/scsi/vhba/Makefile

@@ -0,0 +1,4 @@
+VHBA_VERSION := 20211218
+
+obj-$(CONFIG_VHBA)		+= vhba.o
+ccflags-y := -DVHBA_VERSION=\"$(VHBA_VERSION)\" -Werror