Revert to static Ethernet driver for the ATARI.

After all there's no momentum for a W5100-based Ethernet solution on the ATARI. So I revert to static linkage of the CS8900A driver as this improves program load times.

cpu/6502/README.md

@@ -40,9 +40,9 @@ high-level configuration macros may be set:
     - Default: 2
     - Purpose: Set the maximum number of concurrent TCP connections.
 
-- ETHERNET
+- STATIC_DRIVER
     - Default: N/A
-    - Purpose: Link Ethernet driver statically instead of loading it dynamically
+    - Purpose: Link device driver statically instead of loading it dynamically
       using the network configuration file.
 
 - WITH_LOGGING

cpu/6502/lib/config.c

@@ -90,15 +90,15 @@ config_read(char *filename)
   log_message("Def. Router: ",  ipaddrtoa(&config.draddr, uip_buf));
   log_message("DNS Server:  ",  ipaddrtoa(&config.resolvaddr, uip_buf));
 
-#ifndef ETHERNET
+#ifndef STATIC_DRIVER
   log_message("Eth. Driver: ",  config.ethernetcfg.name);
-#else /* !ETHERNET */
+#else /* !STATIC_DRIVER */
   #define _stringize(arg) #arg
   #define  stringize(arg) _stringize(arg)
   log_message("Eth. Driver: ",  stringize(ETHERNET));
   #undef  _stringize
   #undef   stringize
-#endif /* !ETHERNET */
+#endif /* !STATIC_DRIVER */
   log_message("Driver Port: $", utoa(config.ethernetcfg.addr, uip_buf, 16));
 
   uip_sethostaddr(&config.hostaddr);

cpu/6502/net/ethernet.c

@@ -63,7 +63,7 @@ ethernet_init(struct ethernet_config *config)
 {
   static const char signature[4] = {0x65, 0x74, 0x68, 0x01};
 
-#ifndef ETHERNET
+#ifndef STATIC_DRIVER
 
   struct mod_ctrl module_control = {cfs_read};
   uint8_t byte;
@@ -91,13 +91,13 @@ ethernet_init(struct ethernet_config *config)
     }
   }
 
-#else /* !ETHERNET */
+#else /* !STATIC_DRIVER */
 
-  extern void ETHERNET;
+  extern void STATIC_DRIVER;
 
-  module = &ETHERNET;
+  module = &STATIC_DRIVER;
 
-#endif /* !ETHERNET */
+#endif /* !STATIC_DRIVER */
 
   module->buffer = uip_buf;
   module->buffer_size = UIP_BUFSIZE;
@@ -126,8 +126,8 @@ ethernet_exit(void)
 {
   module->exit();
 
-#ifndef ETHERNET
+#ifndef STATIC_DRIVER
   mod_free(module);
-#endif /* !ETHERNET */
+#endif /* !STATIC_DRIVER */
 }
 /*---------------------------------------------------------------------------*/