Revert "eth: remove the DLink/Sundance (ST201) driver"

This reverts commit 8401a108a6.

I got a report from an (anonymous) Sundance user:

  Ethernet controller: Sundance Technology Inc / IC Plus Corp IC Plus IP100A Integrated 10/100 Ethernet MAC + PHY (rev 31)

Revert the driver back in. Make following changes:
 - update Denis's email address in MAINTAINERS
 - adjust to timer API renames:
   - del_timer_sync() -> timer_delete_sync()
   - from_timer() -> timer_container_of()

Fixes: 8401a108a6 ("eth: remove the DLink/Sundance (ST201) driver")
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250901210818.1025316-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

MAINTAINERS

@@ -24252,6 +24252,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/input/allwinner,sun4i-a10-lradc-keys.yaml
 F:	drivers/input/keyboard/sun4i-lradc-keys.c
 
+SUNDANCE NETWORK DRIVER
+M:	Denis Kirjanov <dkirjanov@suse.de>
+L:	netdev@vger.kernel.org
+S:	Maintained
+F:	drivers/net/ethernet/dlink/sundance.c
+
 SUNPLUS ETHERNET DRIVER
 M:	Wells Lu <wellslutw@gmail.com>
 L:	netdev@vger.kernel.org

arch/mips/configs/mtx1_defconfig

@@ -273,6 +273,7 @@ CONFIG_DM9102=m
 CONFIG_ULI526X=m
 CONFIG_PCMCIA_XIRCOM=m
 CONFIG_DL2K=m
+CONFIG_SUNDANCE=m
 CONFIG_PCMCIA_FMVJ18X=m
 CONFIG_E100=m
 CONFIG_E1000=m

arch/powerpc/configs/ppc6xx_defconfig

@@ -433,6 +433,7 @@ CONFIG_DM9102=m
 CONFIG_ULI526X=m
 CONFIG_PCMCIA_XIRCOM=m
 CONFIG_DL2K=m
+CONFIG_SUNDANCE=m
 CONFIG_S2IO=m
 CONFIG_FEC_MPC52xx=m
 CONFIG_GIANFAR=m

drivers/net/ethernet/dlink/Kconfig

@@ -32,4 +32,24 @@ config DL2K
 	  To compile this driver as a module, choose M here: the
 	  module will be called dl2k.
 
+config SUNDANCE
+	tristate "Sundance Alta support"
+	depends on PCI
+	select CRC32
+	select MII
+	help
+	  This driver is for the Sundance "Alta" chip.
+	  More specific information and updates are available from
+	  <http://www.scyld.com/network/sundance.html>.
+
+config SUNDANCE_MMIO
+	bool "Use MMIO instead of PIO"
+	depends on SUNDANCE
+	help
+	  Enable memory-mapped I/O for interaction with Sundance NIC registers.
+	  Do NOT enable this by default, PIO (enabled when MMIO is disabled)
+	  is known to solve bugs on certain chips.
+
+	  If unsure, say N.
+
 endif # NET_VENDOR_DLINK

drivers/net/ethernet/dlink/Makefile

@@ -4,3 +4,4 @@
 #
 
 obj-$(CONFIG_DL2K) += dl2k.o
+obj-$(CONFIG_SUNDANCE) += sundance.o