usb: ftdi-elan: Delete driver

This driver didn't see real maintainance since several years. It has
several trivial issues (check $(scripts/checkpatch.pl -f
drivers/usb/misc/ftdi-elan.c)) and some harder ones (difficult locking,
explict kref handling, ...). Also today it's hard to find hardware to
make actually use of such a card and I suspect the driver is completely
unused.

So remove it.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230321150919.351947-1-u.kleine-koenig@pengutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/mips/configs/mtx1_defconfig

@@ -553,7 +553,6 @@ CONFIG_USB_LCD=m
 CONFIG_USB_CYPRESS_CY7C63=m
 CONFIG_USB_CYTHERM=m
 CONFIG_USB_IDMOUSE=m
-CONFIG_USB_FTDI_ELAN=m
 CONFIG_USB_APPLEDISPLAY=m
 CONFIG_USB_SISUSBVGA=m
 CONFIG_USB_LD=m

arch/powerpc/configs/ppc6xx_defconfig

@@ -907,7 +907,6 @@ CONFIG_USB_SEVSEG=m
 CONFIG_USB_LEGOTOWER=m
 CONFIG_USB_LCD=m
 CONFIG_USB_IDMOUSE=m
-CONFIG_USB_FTDI_ELAN=m
 CONFIG_USB_APPLEDISPLAY=m
 CONFIG_USB_SISUSBVGA=m
 CONFIG_USB_LD=m

drivers/usb/misc/Kconfig

@@ -108,26 +108,6 @@ config USB_IDMOUSE
 
 	  See also <https://www.fs.tum.de/~echtler/idmouse/>.
 
-config USB_FTDI_ELAN
-	tristate "Elan PCMCIA CardBus Adapter USB Client"
-	help
-	  ELAN's Uxxx series of adapters are USB to PCMCIA CardBus adapters.
-	  Currently only the U132 adapter is available.
-
-	  The U132 is specifically designed for CardBus PC cards that contain
-	  an OHCI host controller. Typical PC cards are the Orange Mobile 3G
-	  Option GlobeTrotter Fusion card. The U132 adapter will *NOT* work
-	  with PC cards that do not contain an OHCI controller. To use a U132
-	  adapter you will need this "ftdi-elan" module as well as the "u132-hcd"
-	  module which is a USB host controller driver that talks to the OHCI
-	  controller within CardBus card that are inserted in the U132 adapter.
-
-	  This driver has been tested with a CardBus OHCI USB adapter, and
-	  worked with a USB PEN Drive inserted into the first USB port of
-	  the PCCARD. A rather pointless thing to do, but useful for testing.
-
-	  It is safe to say M here.
-
 config USB_APPLEDISPLAY
 	tristate "Apple Cinema Display support"
 	select BACKLIGHT_CLASS_DEVICE

drivers/usb/misc/Makefile

@@ -10,7 +10,6 @@ obj-$(CONFIG_USB_CYTHERM)		+= cytherm.o
 obj-$(CONFIG_USB_EMI26)			+= emi26.o
 obj-$(CONFIG_USB_EMI62)			+= emi62.o
 obj-$(CONFIG_USB_EZUSB_FX2)		+= ezusb.o
-obj-$(CONFIG_USB_FTDI_ELAN)		+= ftdi-elan.o
 obj-$(CONFIG_APPLE_MFI_FASTCHARGE)	+= apple-mfi-fastcharge.o
 obj-$(CONFIG_USB_IDMOUSE)		+= idmouse.o
 obj-$(CONFIG_USB_IOWARRIOR)		+= iowarrior.o