update devices to reference marvell sata controllers.

Reference: /n/sources/patch/applied/man8fsconfig
Date: Fri Mar  2 16:19:50 CET 2007
Signed-off-by: quanstro@quanstro.net

--- /sys/man/8/fsconfig	Fri Mar  2 16:19:20 2007
+++ /sys/man/8/fsconfig	Fri Mar  2 16:19:17 2007
@@ -127,6 +127,26 @@
 .B h1.0.0
 (second IDE controller, master drive).
 .TP
+.BI m n1 . n2 . n3
+.I M
+is similar to
+.IR h ,
+but for SATA drives connected to Marvell 
+88SX[56]0[48][01] controllers.  There is no need to specify
+the controllers in 
+.B plan9.ini
+as they are autodiscovered.
+Hot-swapping drives is not currently supported.  Similar target
+naming rules apply as for IDE controllers.  However the
+controller-number is multiplied by the number of 
+drives the controller supports rather than 2.
+Thus
+.B m9
+is equivalent to
+.B m1.1.0
+(second controller, second drive),
+if the first controller supports 8 drives.
+.TP
 .BI l n1 . n2 . n3
 .TP
 .BI r n1 . n2 . n3