net: tulip: remove xircom_cb driver

A possible bug was found in investigate_read_descriptor() and a fix was
proposed. Since this is an orphan driver for hardware that is old,
removing the driver was suggested instead. This patch removes the driver.

Jakub: clean up the Kconfig and platform configs

Link: https://lore.kernel.org/netdev/2026080158-next-diligent-b4ce@gregkh
Signed-off-by: Pablo Vallespín Aranguren <pablopva014@gmail.com>
Link: https://patch.msgid.link/am48DR5FC-xTY3-D@ThinkPad-P15
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

arch/mips/configs/mtx1_defconfig

@@ -234,7 +234,6 @@ CONFIG_TULIP=m
 CONFIG_WINBOND_840=m
 CONFIG_DM9102=m
 CONFIG_ULI526X=m
-CONFIG_PCMCIA_XIRCOM=m
 CONFIG_DL2K=m
 CONFIG_SUNDANCE=m
 CONFIG_E100=m

arch/powerpc/configs/ppc6xx_defconfig

@@ -412,7 +412,6 @@ CONFIG_TULIP_MMIO=y
 CONFIG_WINBOND_840=m
 CONFIG_DM9102=m
 CONFIG_ULI526X=m
-CONFIG_PCMCIA_XIRCOM=m
 CONFIG_DL2K=m
 CONFIG_SUNDANCE=m
 CONFIG_FEC_MPC52xx=m

drivers/net/ethernet/dec/tulip/Kconfig

@@ -5,9 +5,9 @@
 
 config NET_TULIP
 	bool "DEC - Tulip devices"
-	depends on (PCI || EISA || CARDBUS)
+	depends on PCI
 	help
-	  This selects the "Tulip" family of EISA/PCI network cards.
+	  This selects the "Tulip" family of PCI network cards.
 
 if NET_TULIP
 
@@ -139,16 +139,4 @@ config ULI526X
 	  To compile this driver as a module, choose M here. The module will
 	  be called uli526x.
 	  
-config PCMCIA_XIRCOM
-	tristate "Xircom CardBus support"
-	depends on CARDBUS
-	help
-	  This driver is for the Digital "Tulip" Ethernet CardBus adapters.
-	  It should work with most DEC 21*4*-based chips/ethercards, as well
-	  as with work-alike chips from Lite-On (PNIC) and Macronix (MXIC) and
-	  ASIX.
-
-	  To compile this driver as a module, choose M here. The module will
-	  be called xircom_cb.  If unsure, say N.
-
 endif # NET_TULIP

drivers/net/ethernet/dec/tulip/Makefile

@@ -5,7 +5,6 @@
 
 ccflags-$(CONFIG_NET_TULIP)	:= -DDEBUG
 
-obj-$(CONFIG_PCMCIA_XIRCOM)	+= xircom_cb.o
 obj-$(CONFIG_DM9102)		+= dmfe.o
 obj-$(CONFIG_WINBOND_840)	+= winbond-840.o
 obj-$(CONFIG_DE2104X)		+= de2104x.o