Staging: add USB serial Quatech driver

Add support for all Quatech usb to serial devices.

Based on an original driver from Quatech.

Cleaned up and forward ported by me.

It's a mess, uses it's own tty layer interface, and the coding style is
horrible.

Cc: Tim Gobeli <tgobeli@quatech.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/Kconfig

@@ -113,5 +113,7 @@ source "drivers/staging/heci/Kconfig"
 
 source "drivers/staging/line6/Kconfig"
 
+source "drivers/staging/serqt_usb/Kconfig"
+
 endif # !STAGING_EXCLUDE_BUILD
 endif # STAGING

drivers/staging/Makefile

@@ -39,3 +39,4 @@ obj-$(CONFIG_IDE_PHISON)	+= phison/
 obj-$(CONFIG_PLAN9AUTH)		+= p9auth/
 obj-$(CONFIG_HECI)		+= heci/
 obj-$(CONFIG_LINE6_USB)		+= line6/
+obj-$(CONFIG_USB_SERIAL_QUATECH_ESU100)	+= serqt_usb/

drivers/staging/serqt_usb/Kconfig

@@ -0,0 +1,9 @@
+config USB_SERIAL_QUATECH_ESU100
+	tristate "USB Quatech ESU-100 8 Port Serial Driver"
+	depends on USB_SERIAL
+	help
+	  Say Y here if you want to use the Quatech ESU-100 8 port usb to
+	  serial adapter.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called serqt_usb.

drivers/staging/serqt_usb/Makefile

@@ -0,0 +1 @@
+obj-$(CONFIG_USB_SERIAL_QUATECH_ESU100)		+= serqt_usb.o