rc: initial addition, Boundary Devices board

rc: correct AR8035 comments
rc.h: CONFIG_IPUV3_CLK 264000000
rc: use nitrogen6x clocks.cfg/ddr-setup.cfg
rc: add CONFIG_CMD_GPIO
rc: explicit fbp_detect_i2c
rc: verify port in board_ehci_hcd_init
rc: use boundary.h
rc: add CONFIG_SPI_FLASH_SPANSION
rc: rc_defconfig add CONFIG_BLOCK_CACHE
rc: use common code for eth init
rc: eth.c now in common directory
rc: move misc_init_r/do_kbd to common
rc: move mmc_init/ dram_init/ overwrite_console/ common_board_init/ splash_screen_prepare/ board_cfb_skip to common
rc: use common 800mhz_4x128mx16.cfg
rc: add  CONFIG_SPI_FLASH_GIGADEVICE: to defconfigs
rc: use common ddr script
rc: port to v2018.07

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

rc: clocks.cfg: set IPU AXI bus priorities

Signed-off-by: Eric Nelson <eric@nelint.com>

rc: update to v2017.01
rc: update to v2017.03

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