sparc: Eliminate prom_stdin.

Completely unused.

Based upon a patch by Julian Calaby.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc/include/asm/oplib_64.h

@@ -18,8 +18,8 @@ extern char prom_version[];
  */
 extern phandle prom_root_node;
 
-/* PROM stdin and stdout */
-extern int prom_stdin, prom_stdout;
+/* PROM stdout */
+extern int prom_stdout;
 
 /* /chosen node of the prom device tree, this stays constant after
  * initialization is complete.

arch/sparc/prom/console_64.c

@@ -13,8 +13,6 @@
 #include <asm/system.h>
 #include <linux/string.h>
 
-extern int prom_stdin, prom_stdout;
-
 static int __prom_console_write_buf(const char *buf, int len)
 {
 	unsigned long args[7];

arch/sparc/prom/init_64.c

@@ -18,7 +18,7 @@
 char prom_version[80];
 
 /* The root node of the prom device tree. */
-int prom_stdin, prom_stdout;
+int prom_stdout;
 phandle prom_chosen_node;
 
 /* You must call prom_init() before you attempt to use any of the
@@ -38,7 +38,6 @@ void __init prom_init(void *cif_handler, void *cif_stack)
 	if (!prom_chosen_node || prom_chosen_node == -1)
 		prom_halt();
 
-	prom_stdin = prom_getint(prom_chosen_node, "stdin");
 	prom_stdout = prom_getint(prom_chosen_node, "stdout");
 
 	node = prom_finddevice("/openprom");