Move NO_WUNUSED_BUT_SET_VARIABLE clang helper to the right place.

sys/conf/kern.mk

 options         KERNVIRTADDR=0xc0000000
 
 include         "std.armv6"
 files           "../allwinner/files.allwinner"
 files           "../allwinner/a20/files.a20"
 files           "../allwinner/a31/files.a31"
 files           "../allwinner/a83t/files.a83t"
 files           "../allwinner/h3/files.h3"
+files           "../nvidia/tegra124/files.tegra124"
 files           "../qemu/files.qemu"
 
 options         SOC_ALLWINNER_A20
 options         SOC_ALLWINNER_A31
 options         SOC_ALLWINNER_A31S
 options         SOC_ALLWINNER_A83T
 options         SOC_ALLWINNER_H3
 
 options         SCHED_ULE               # ULE scheduler
 options         SMP                     # Enable multiple cores
 options         PLATFORM
 options         PLATFORM_SMP
 options         MULTIDELAY
+options         LINUX_BOOT_ABI
 
 # EXT_RESOURCES pseudo devices
 options         EXT_RESOURCES
 device          clk
 device          phy
 device          hwreset
 device          regulator
 
 # Interrupt controller
 options         INTRNG
 device          gic
 
 # ARM Generic Timer
 device          generic_timer
 
 # MMC/SD/SDIO Card slot support
+device          sdhci                   # SD controller
 device          mmc                     # mmc/sd bus
 device          mmcsd                   # mmc/sd flash cards
 
 # ATA controllers
 device          ahci                    # AHCI-compatible SATA controllers
 #device         ata                     # Legacy ATA/SATA controllers
 
+# PCI
+options         NEW_PCIB
+device          pci
+
+# PCI NICs
+device          re                      # RealTek 8139C+/8169/8169S/8110S
+
 # VirtIO
 device          virtio
 device          virtio_mmio
 device          virtio_blk
 device          vtnet
 
 # Console and misc
 device          uart
+device          uart_ns8250
 device          uart_snps
 device          pl011
 device          pty
 device          snp
-device          md
+device          md                      # Memory "disks"
 device          random                  # Entropy device
 device          psci
 
 # I2C support
 device          iicbus
 device          iic
 device          twsi
 device          rsb
 device          axp209                  # AXP209 Power Management Unit
 device          axp81x                  # AXP813/818 Power Management Unit
+device          icee
 
 # GPIO
 device          gpio
 device          gpioled
 
 device          scbus                   # SCSI bus (required for ATA/SCSI)
 device          da                      # Direct Access (disks)
+device          cd                      # CD
 device          pass                    # Passthrough device (direct ATA/SCSI access)
 
 # USB support
 options         USB_HOST_ALIGN=64       # Align usb buffers to cache line size.
 device          usb
 #device         uhci
 device          ohci
 device          ehci
 
-device          umass
+device          umass                   # Disks/Mass storage - Requires scbus and da
+device          uhid                    # "Human Interface Devices"
+device          ukbd                    # Allow keyboard like HIDs to control console
 
 # Ethernet
 device          loop
 device          ether
+device          vlan                    # 802.1Q VLAN support
 device          mii
 device          bpf
 
 #device         emac                    # 10/100 integrated EMAC controller
 device          dwc                     # 10/100/1000 integrated GMAC controller
 device          awg                     # 10/100/1000 integrated EMAC controller
 
 # USB ethernet support, requires miibus