MIPS: defconfig: Cleanup from old Kconfig options

Remove old, dead Kconfig options (in order appearing in this commit):
 - EXPERIMENTAL is gone since v3.9;
 - INET_LRO: commit 7bbf3cae ("ipv4: Remove inet_lro library");
 - MTD_CONCAT: commit f53fdebc ("mtd: drop MTD_CONCAT from Kconfig
   entirely");
 - MTD_CHAR: commit 660685d9 ("mtd: merge mtdchar module with
   mtdcore");
 - NETDEV_1000 and NETDEV_10000: commit f860b052 ("drivers/net:
   Kconfig and Makefile cleanup"); NET_ETHERNET should be replaced with
   just ETHERNET but that is separate change;
 - MISC_DEVICES: commit 7c5763b8 ("drivers: misc: Remove
   MISC_DEVICES config option");
 - HID_SUPPORT: commit 1f41a6a9 ("HID: Fix the generic Kconfig
   options");
 - BT_L2CAP and BT_SCO: commit f1e91e16 ("Bluetooth: Always compile
   SCO and L2CAP in Bluetooth Core");
 - DEBUG_ERRORS: commit b025a3f8 ("ARM: 6876/1: Kconfig.debug:
   Remove unused CONFIG_DEBUG_ERRORS");
 - USB_DEVICE_CLASS: commit 007bab91 ("USB: remove
   CONFIG_USB_DEVICE_CLASS");
 - RCU_CPU_STALL_DETECTOR: commit a00e0d71 ("rcu: Remove conditional
   compilation for RCU CPU stall warnings");
 - IP_NF_QUEUE: commit 3dd6664f ("netfilter: remove unused "config
   IP_NF_QUEUE"");
 - IP_NF_TARGET_ULOG: commit d4da843e ("netfilter: kill remnants of
   ulog targets");
 - IP6_NF_QUEUE: commit d16cf20e ("netfilter: remove ip_queue
   support");
 - IP6_NF_TARGET_LOG: commit 6939c33a ("netfilter: merge ipt_LOG and
   ip6_LOG into xt_LOG");
 - USB_LED: commit a335aaf3 ("usb: misc: remove outdated USB LED
   driver");
 - MMC_UNSAFE_RESUME: commit 2501c917 ("mmc: core: Use
   MMC_UNSAFE_RESUME as default behavior");
 - AUTOFS_FS: commit 561c5cf9 ("staging: Remove autofs3");
 - VIDEO_OUTPUT_CONTROL: commit f167a64e ("video / output: Drop
   display output class support");
 - USB_LIBUSUAL: commit f61870ee ("usb: remove libusual");
 - CRYPTO_ZLIB: 11049218 ("crypto: compress - remove unused pcomp
   interface");
 - BLK_DEV_UB: commit 68a5059e

 ("block: remove the deprecated ub
   driver");

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: linux-mips@linux-mips.org
Cc: linux-arm-kernel@lists.infradead.org
Patchwork: https://patchwork.linux-mips.org/patch/16342/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>