MIPS: Remove TX39XX support

No (active) developer owns this hardware, so let's remove Linux support.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>

arch/mips/configs/jmr3927_defconfig

@@ -1,50 +0,0 @@
-CONFIG_SYSVIPC=y
-CONFIG_LOG_BUF_SHIFT=14
-CONFIG_EXPERT=y
-CONFIG_SLAB=y
-CONFIG_MACH_TX39XX=y
-CONFIG_TOSHIBA_JMR3927=y
-# CONFIG_SECCOMP is not set
-CONFIG_PCI=y
-CONFIG_NET=y
-CONFIG_PACKET=y
-CONFIG_UNIX=y
-CONFIG_INET=y
-CONFIG_IP_PNP=y
-CONFIG_IP_PNP_BOOTP=y
-# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
-# CONFIG_INET_XFRM_MODE_TUNNEL is not set
-# CONFIG_INET_XFRM_MODE_BEET is not set
-# CONFIG_INET_DIAG is not set
-# CONFIG_IPV6 is not set
-CONFIG_MTD=y
-CONFIG_MTD_CMDLINE_PARTS=y
-CONFIG_MTD_CFI=y
-CONFIG_MTD_JEDECPROBE=y
-CONFIG_MTD_CFI_AMDSTD=y
-CONFIG_MTD_PHYSMAP=y
-CONFIG_NETDEVICES=y
-CONFIG_TC35815=y
-# CONFIG_INPUT is not set
-# CONFIG_SERIO is not set
-# CONFIG_VT is not set
-# CONFIG_UNIX98_PTYS is not set
-CONFIG_SERIAL_NONSTANDARD=y
-CONFIG_SERIAL_TXX9_CONSOLE=y
-CONFIG_SERIAL_TXX9_STDSERIAL=y
-# CONFIG_HW_RANDOM is not set
-# CONFIG_HWMON is not set
-CONFIG_WATCHDOG=y
-CONFIG_TXX9_WDT=y
-# CONFIG_USB_SUPPORT is not set
-CONFIG_NEW_LEDS=y
-CONFIG_LEDS_CLASS=y
-CONFIG_LEDS_GPIO=y
-CONFIG_LEDS_TRIGGERS=y
-CONFIG_LEDS_TRIGGER_HEARTBEAT=y
-CONFIG_RTC_CLASS=y
-CONFIG_RTC_DRV_DS1742=y
-CONFIG_PROC_KCORE=y
-# CONFIG_MISC_FILESYSTEMS is not set
-CONFIG_NFS_FS=y
-CONFIG_ROOT_NFS=y