The mdelay function was used between I/O access commands, that causes peak
in CPU usage. Fix it by substitution mdelay to msleep.

Expand usage on fitPC2 compatible boards according to DMI identification.
Signed-off-by: NDenis Turischev <denis@compulab.co.il>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>