Add support for extra files in sdcard image
Add support for extra files in sdcard image

SOCFPGA_SDIMG_EXTRA_FILES lists any files to be added from
the DEPLOYDIR to the FAT partition of the sdcard image

Signed-off-by: Dalon Westergreen <abdebe3fdddaa7489d78852260a29cad9600d76a@intel.com>

kraj/meta-altera,dwesterg/meta-altera,dwesterg/meta-altera,kraj/meta-altera,kraj/meta-altera