insp: initial addition, Boundary Devices board

insp: enable both hdmi/lcd with LSA40AT9001 resolution
insp.h: CONFIG_IPUV3_CLK 264000000
insp: use nitrogen6x clocks.cfg/ddr-setup.cfg
insp: add 1g memory configuration
insp: calibrate 1G memory, (15 board sample size)
insp: set wlmac
insp: add environment variables allow_noncea=1;bootdelay=1;preboot;splashsize
insp: add CONFIG_CMD_GPIO
insp: remove FEC config options, no fec on board
insp: explicit fbp_detect_i2c
insp: s/mac/mac_addres/ for consistentcy
insp: use boundary.h
insp: setup rgb_gpio_pads in board_early_init_f
insp: add CONFIG_SPI_FLASH_SPANSION
insp: insp_defconfig add CONFIG_BLOCK_CACHE
insp2g: insp2g_defconfig add CONFIG_BLOCK_CACHE
insp: add splashimage to prevent data abort on preboot
insp: use common code for eth init
insp: eth.c now in common directory
insp: move misc_init_r/do_kbd to common
insp: remove code for non-existent max77823 chip
insp: move mmc_init/ dram_init/ overwrite_console/ common_board_init/ splash_screen_prepare/ board_cfb_skip to common
insp: no functional change, move pads in list, add comment
insp: use common 1066mhz_4x256mx16.cfg
insp: use common 1066mhz_4x128mx16.cfg
insp: add  CONFIG_SPI_FLASH_GIGADEVICE: to defconfigs
insp: use common ddr scripts
insp: port to v2018.07

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

insp: update to v2017.01
insp: update to v2017.03

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>