x86, setup: When probing memory with e801, use ax/bx as a pair
x86, setup: When probing memory with e801, use ax/bx as a pair

When we use BIOS function e801 to probe memory, we should use ax/bx
(or cx/dx) as a pair, not mix and match.  This was a typo during the
translation from assembly code, and breaks at least one set of
machines in the field (which return cx = dx = 0).

Reported-and-tested-by: Chris Samuel <711c73f64afdce07b7e38039a96d2224209e9a6c@csamuel.org>
Fix-proposed-by: Thomas Meyer <5f50a84c1fa3bcff146405017f36aec1a10a9e38@m3y3r.de>
Link: 3b164e57c5daecd38aa14373f86c1a93de49208a@localhost.localdomain

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs