move integrated BIOS code to gensoc
IntegratedBIOS: read only
set LM32 reset address
targets/simple: add GPIO LED
spiflash: add read-only variable data width spi flash

Signed-off-by: Robert Jordens <jordens@gmail.com>
targets/simple: map SPI flash
norflash: add support for writes
norflash16: fix LSB
videomixer: config system + store video resolution in flash
make: support build options
make/_misoc_import: force external path search
targets/mlabs_video: use new Cat syntax
gpio: add InOut
update submodule
gitmodules: use https and m-labs
make: add decorator option
make.py: update description
gensoc: use add_verilog_include_path
gensoc: support for user-defined UART and add default values for SRAM and L2 sizes
downscaler: add chopper module