Add support for SST READ ID 0x90/0xAB commands for reading out the flash
manufacturer ID and device ID.
Signed-off-by: NFrancisco Iglesias <frasse.iglesias@gmail.com>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20171126231634.9531-3-frasse.iglesias@gmail.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>