Seems I confused Mb and MB and was in too much of a rush when I added the DDR3 bits.  Take into account more of the spd data and compute DDR3 module size in a way similiar to NetBSD so it comes out correctly.
Seems I confused Mb and MB and was in too much of a rush when I
added the DDR3 bits.  Take into account more of the spd
data and compute DDR3 module size in a way similiar to
NetBSD so it comes out correctly.

Tested by Olivier Cherrier and Christian Stuermer.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars