tty/serial: remove the ioc3_serial driver

The SGI SN2 support is about to be removed.  Remove this driver that
depends on the SN2 support.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lkml.kernel.org/r/20190813072514.23299-9-hch@lst.deSigned-off-by: Tony Luck <tony.luck@intel.com>

MAINTAINERS

@@ -8406,12 +8406,6 @@ L:	linux-mips@vger.kernel.org
 S:	Maintained
 F:	drivers/net/ethernet/sgi/ioc3-eth.c
 
-IOC3 SERIAL DRIVER
-M:	Pat Gefre <pfg@sgi.com>
-L:	linux-serial@vger.kernel.org
-S:	Maintained
-F:	drivers/tty/serial/ioc3_serial.c
-
 IOMAP FILESYSTEM LIBRARY
 M:	Christoph Hellwig <hch@infradead.org>
 M:	Darrick J. Wong <darrick.wong@oracle.com>

arch/ia64/configs/gensparse_defconfig

@@ -83,7 +83,6 @@ CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=6
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_SHARE_IRQ=y
-CONFIG_SERIAL_SGI_IOC3=y
 # CONFIG_HW_RANDOM is not set
 CONFIG_EFI_RTC=y
 CONFIG_RAW_DRIVER=m

drivers/tty/serial/Kconfig

@@ -972,14 +972,6 @@ config SERIAL_JSM
 	  To compile this driver as a module, choose M here: the
 	  module will be called jsm.
 
-config SERIAL_SGI_IOC3
-	tristate "SGI Altix IOC3 serial support"
-	depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC3
-	select SERIAL_CORE
-	help
-	  If you have an SGI Altix with an IOC3 serial card,
-	  say Y or M.  Otherwise, say N.
-
 config SERIAL_MSM
 	tristate "MSM on-chip serial port support"
 	depends on ARCH_QCOM

drivers/tty/serial/Makefile

@@ -52,7 +52,6 @@ obj-$(CONFIG_SERIAL_SC16IS7XX_CORE) += sc16is7xx.o
 obj-$(CONFIG_SERIAL_JSM) += jsm/
 obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o
 obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o
-obj-$(CONFIG_SERIAL_SGI_IOC3) += ioc3_serial.o
 obj-$(CONFIG_SERIAL_ATMEL) += atmel_serial.o
 obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o
 obj-$(CONFIG_SERIAL_MSM) += msm_serial.o