drivers: remove the SGI SN2 IOC3 base support

The IOC3 is a multi-function chip seen on SGI SN2 and some SGI
MIPS systems.  This removes the last bit of SN2 specific support,
while the bits used by the mips ports are still around (and being
substantially rewritten at the moment).
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lkml.kernel.org/r/20190813072514.23299-14-hch@lst.deSigned-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/Kconfig

@@ -493,8 +493,6 @@ config IA64_HP_AML_NFW
 	  the "force" module parameter, e.g., with the "aml_nfw.force"
 	  kernel command line option.
 
-source "drivers/sn/Kconfig"
-
 config KEXEC
 	bool "kexec system call"
 	depends on !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)

arch/ia64/configs/gensparse_defconfig

@@ -19,7 +19,6 @@ CONFIG_SPARSEMEM_MANUAL=y
 CONFIG_IA64_MCA_RECOVERY=y
 CONFIG_PERFMON=y
 CONFIG_IA64_PALINFO=y
-CONFIG_SGI_IOC3=y
 CONFIG_EFI_VARS=y
 CONFIG_BINFMT_MISC=m
 CONFIG_ACPI_BUTTON=m

drivers/Makefile

@@ -132,7 +132,6 @@ obj-y				+= mmc/
 obj-$(CONFIG_MEMSTICK)		+= memstick/
 obj-$(CONFIG_NEW_LEDS)		+= leds/
 obj-$(CONFIG_INFINIBAND)	+= infiniband/
-obj-$(CONFIG_SGI_SN)		+= sn/
 obj-y				+= firmware/
 obj-$(CONFIG_CRYPTO)		+= crypto/
 obj-$(CONFIG_SUPERH)		+= sh/

drivers/sn/Kconfig

-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Miscellaneous SN-specific devices
-#
-
-menu "SN Devices"
-	depends on SGI_SN
-
-config SGI_IOC3
-	tristate "SGI IOC3 Base IO support"
-	default m
-	---help---
-	This option enables basic support for the SGI IOC3-based Base IO
-	controller card.  This option does not enable any specific
-	functions on such a card, but provides necessary infrastructure
-	for other drivers to utilize.
-
-	If you have an SGI Altix with an IOC3-based
-	I/O controller or a PCI IOC3 serial card say Y.
-	Otherwise say N.
-
-endmenu

drivers/sn/Makefile

-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the Altix device drivers.
-#
-#
-
-obj-$(CONFIG_SGI_IOC3) += ioc3.o