Renamed Atari drivers.

As a preparation for the introduction of the 'atarixl' target it is
necessary that all drivers have a base name...
- no longer than 7 characters
- with a common prefix

libsrc/atari/joy_stat_stddrv.s

@@ -7,8 +7,8 @@
 ;
 
         .export _joy_static_stddrv
-        .import _ataristd_joy
+        .import _atrstd_joy
 
 .rodata
 
-_joy_static_stddrv := _ataristd_joy
+_joy_static_stddrv := _atrstd_joy

libsrc/atari/joy_stddrv.s

@@ -10,4 +10,4 @@
 
 .rodata
 
-_joy_stddrv:    .asciiz "ataristd.joy"
+_joy_stddrv:    .asciiz "atrstd.joy"

libsrc/atari/tgi_stat_stddrv.s

@@ -7,8 +7,8 @@
 ;
 
         .export _tgi_static_stddrv
-        .import _atari8_tgi
+        .import _atr8_tgi
 
 .rodata
 
-_tgi_static_stddrv := _atari8_tgi
+_tgi_static_stddrv := _atr8_tgi

libsrc/atari/tgi_stddrv.s

@@ -10,4 +10,4 @@
 
 .rodata
 
-_tgi_stddrv:    .asciiz "atari8.tgi"
+_tgi_stddrv:    .asciiz "atr8.tgi"