cfg: use consistent chipname

Change-Id: I41e0788f830d5ece13e6231a99d5b4013c9c678f
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/331
Tested-by: jenkins
Reviewed-by: Mathias Küster <kesmtp@freenet.de>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

tcl/target/stm32f1x.cfg

@@ -1,9 +1,9 @@
-# script for stm32
+# script for stm32f1x family
 
 if { [info exists CHIPNAME] } {
    set _CHIPNAME $CHIPNAME
 } else {
-   set _CHIPNAME stm32
+   set _CHIPNAME stm32f1x
 }
 
 if { [info exists ENDIAN] } {

tcl/target/stm32f2x.cfg

@@ -1,9 +1,9 @@
-# script for stm32f2xxx
+# script for stm32f2x family
 
 if { [info exists CHIPNAME] } {
    set _CHIPNAME $CHIPNAME
 } else {
-   set _CHIPNAME stm32f2xxx
+   set _CHIPNAME stm32f2x
 }
 
 if { [info exists ENDIAN] } {