Update to 3.19-rc1.
- Eliminated 5 patches.
- Xen needs updating.
- ARM configs need updating.
- Config changes:
  - General
    - INIT_FALLBACK (y, default, consistent with old default)
    - PAGE_EXTENSION=n (overhead)
      - PAGE_OWNER=n (overhead)

  - Networking:
    - NET_FOU_IP_TUNNELS=y
    - NFT_REDIR=m
    - NFT_REDIR_IPV4=m
    - NFT_REDIR_IPV6=m
    - NET_DSA_HWMON=y
    - NET_ACT_VLAN=m
    - NET_SWITCHDEV=y (only impact is a slightly bigger ndo)
    - BT_BREDR=y
    - BT_LE=y
    - IPVLAN=m
    - NET_DSA_MV88E6352=m
    - ROCKER=m
    - BCMGENET=m

  - Driver options:
    - CONFIG_MAC80211_RC_MINSTREL_VHT=y
    - ATH9K_PCOEM=y
    - RTC_DRV_DS1374_WDT=y
    - INFINIBAND_ON_DEMAND_PAGING=y
    - SQUASHFS_LZ4=y

  - Drivers:
    - SCSI_AM53C974=m
    - SCSI_WD719X=m
    - KEYBOARD_CAP11XX=m
    - MOUSE_ELAN_I2C=m
    - TOUCHSCREEN_GOODIX=m
    - TOUCHSCREEN_ELAN=m
    - IPMI_SSIF=m
    - I2C_SLAVE=y (does nothing; only here for future additions)
    - GPIO_74XX_MMIO=m
    - SENSORS_NCT7802=m
    - MFD_DLN2=m
    - I2C_DLN2=m
    - GPIO_DLN2
    - IR_IGORPLUGUSB=m
    - DVB_SMIPCIE=m
    - DVB_MN88472=m
    - DVB_MN88473=m
    - VIDEO_SAA7191=n (staging/deprecated)
    - VIDEO_VIM2M=m
    - DRM_I2C_ADV7511=m
    - SND_OXFW=m
    - HID_PLANTRONICS=m
    - MMC_TOSHIBA_PCI=m
    - LEDS_LP8860=m

  - x86
    - X86_INTEL_MPX=y (default n, little kernel overhead for potential security gains)
    - RCU_KTHREAD_PRIO=1 (default)
    - X86_VSYSCALL_EMULATION=y
    - HSA_AMD=m
    - EDAC_AMD64=m
      - EDAC_AMD64_ERROR_INJECTION=y

  - ppc
    - OF_UNITTEST=n
    - IPMI_POWERNV=m
    - I2C_OPAL=m
    - RTC_DRV_OPAL=m

  - s390x
    - SCLP_ASYNC_ID=000000000 (default)

  - SoC
    - PINCTRL_CHERRYVIEW=n

  - ARM?: (all n)
    - PMIC
    - MFD_ATMEL_HLCDC
    - COMMON_CLK_XLNX_CLKWZRD
    - QCOM_SPMI_IADC

  - Mobile sensors: (all n)
    - SI7020
    - BMP280