Make it explicit that D_MEM cdevsw d_flag is to signify that the

driver is (or behaves identically to) /dev/mem.  Remove the D_MEM flag
from random drivers.

Note that currently the D_MEM flag does not affect any behaviour, but
this going to change in the next commit.

Noted and reviewed by:	alc
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
X-Differential revision:	https://reviews.freebsd.org/D6149

sys/dev/firewire/fwdev.c

@@ -80,7 +80,6 @@ struct cdevsw firewire_cdevsw = {
 	.d_mmap =	fw_mmap,
 	.d_strategy =	fw_strategy,
 	.d_name =	"fw",
-	.d_flags =	D_MEM
 };
 
 struct fw_drv1 {

sys/i386/bios/smapi.c

@@ -80,7 +80,7 @@ static struct cdevsw smapi_cdevsw = {
 	.d_version =	D_VERSION,
 	.d_ioctl =	smapi_ioctl,
 	.d_name =	"smapi",
-	.d_flags =	D_MEM | D_NEEDGIANT,
+	.d_flags =	D_NEEDGIANT,
 };
 
 static void	smapi_identify(driver_t *, device_t);

sys/sys/conf.h

@@ -138,7 +138,7 @@ typedef int dumper_t(
 #define	D_TAPE	0x0001
 #define	D_DISK	0x0002
 #define	D_TTY	0x0004
-#define	D_MEM	0x0008
+#define	D_MEM	0x0008	/* /dev/(k)mem */
 
 #ifdef _KERNEL