Update to 4.1-rc1.
    - Xen needs updating.
    - ARM configs need updating.
    - Stack unwinding needs updating.
    - 11 patches eliminated.
    - Config changes:
      - Generic:
        - MULTIUSER=y (default)
      - Networking
      - 6LOWPAN_NHC=m
        - 6LOWPAN_NHC_DEST=m
        - 6LOWPAN_NHC_FRAGMENT=m
        - 6LOWPAN_NHC_HOP=m
        - 6LOWPAN_NHC_IPV6=m
        - 6LOWPAN_NHC_MOBILITY=m
        - 6LOWPAN_NHC_ROUTING=m
        - 6LOWPAN_NHC_UDP=m
      - MPLS_ROUTING=m
      - BT_DEBUGFS=n
    
      - Driver options:
        - BT_HCIBTUSB
          - BT_HCIBTUSB_BCM=y
        - BT_HCIUART
          - BT_HCIUART_INTEL=y
          - BT_HCIUART_BCM=y
        - TARGET_CORE
          - TCM_USER2=m
        - CHELSIO_T4
          - CHELSIO_T4_FCOE=y
        - MOUSE_PS2
          - MOUSE_PS2_VMMOUSE=y
    
      - New modules:
        - TOUCHSCREEN_CHIPONE_ICN8318=m
        - TOUCHSCREEN_SX8654=m
        - NFC_NXP_NCI=m
          - NFC_NXP_NCI_I2C=m
    
      - Storage:
        - BLK_DEV_PMEM=m
        - MD_CLUSTER=m
        - DM_MQ_DEFAULT=n (needs performance testing)
        - DM_LOG_WRITES=m
        - MTD_PARTITIONED_MASTER=y
    
      - x86/x86_64:
        - SCHED_OMIT_FRAME_POINTER=y (only because unwinding needs updating)
        - X86_PMEM_LEGACY=y (compatibility)
        - MFD_INTEL_QUARK_I2C_GPIO=m
        - PINCTRL_AMD=y
    
      - ARM (disabled):
        - MACB=n
        - KEYBOARD_BCM=n
        - TCG_TIS_ST33ZP24=n
        - SPI_CADENCE=n
        - GPIO_ALTERA=n
        - GPIO_DWAPB=n
        - POWER_RESET_SYSCON_POWEROFF=n
        - CADENCE_WATCHDOG=n
        - MFD_MAX77843=n
        - MFD_MT6397=n