cosmetic: doc: driver-model: Do not number driver lists

Everytime a dead driver is removed from the list,
we must re-number. This is a painful task.

Try
  git show e53232250 -- doc/driver-model/UDM-serial.txt
  git show 6f62f4207 -- doc/driver-model/UDM-serial.txt
  git show b9f4bc34a -- doc/driver-model/UDM-serial.txt
to see what I mean.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/doc/driver-model/UDM-pcmcia.txt b/doc/driver-model/UDM-pcmcia.txt
index fc31461..d55e89d 100644
--- a/doc/driver-model/UDM-pcmcia.txt
+++ b/doc/driver-model/UDM-pcmcia.txt
@@ -47,32 +47,32 @@
 III) Analysis of in-tree drivers
 --------------------------------
 
-  1) i82365.c
-  -----------
+  i82365.c
+  --------
     Driver methods have different name i82365_init() and i82365_exit but
     all functionality is the same. Board files board/atc/ti113x.c and
     board/cpc45/pd67290.c use their own implementation of these method.
     In this case all methods in driver behave only as wrappers.
 
-  2) marubun_pcmcia.c
-  -------------------
+  marubun_pcmcia.c
+  ----------------
     Meets standard API behaviour. Simple conversion.
 
-  3) mpc8xx_pcmcia.c
-  ------------------
-    Meets standard API behaviour. Simple conversion.
-
-  4) rpx_pcmcia.c
+  mpc8xx_pcmcia.c
   ---------------
+    Meets standard API behaviour. Simple conversion.
+
+  rpx_pcmcia.c
+  ------------
     Implements only internal API used in other drivers. Non of methods
     implemented here are used outside driver model.
 
-  5) ti_pci1410a.c
-  ----------------
+  ti_pci1410a.c
+  -------------
     Has different API but methods in this file are never called. Probably
     dead code.
 
-  6)tqm8xx_pcmcia.c
-  -----------------
+  tqm8xx_pcmcia.c
+  ---------------
     Implements only internal API used in other drivers. Non of methods
     implemented here are used outside driver model.