K 10
svn:author
V 7
oshogbo
K 8
svn:date
V 27
2017-02-25T18:14:32.868578Z
K 7
svn:log
V 327
Remove unused macro from common/drv.c.

When we was compering it to code from boot2 it also looks like
this code is buggy and boot2 was never updated to use this code.
USE_XREAD flag is unused in boot2, and common/drv.c was never
build with that flag.

Reviewed by:	jhb
Differential Revision:	https://reviews.freebsd.org/D9780

END