defconfig: espressobin: Include support for Gigadevice SPI

Include support for CONFIG_SPI_FLASH_GIGADEVICE for supporting
newly produces EspressoBin boards (v7)

Change-Id: I5d4b972cbe2ee5a9d52ce9908794ad4e1b59ee3b
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/61236


Tested-by: iSoC Platform CI <ykjenk@marvell.com>
Reviewed-by: Igal Liberman <igall@marvell.com>
Reviewed-by: Stefan Roese <sr@denx.de>