sparc: Eliminate prom_stdin.

Completely unused.

Based upon a patch by Julian Calaby.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/prom/init_64.c b/arch/sparc/prom/init_64.c
index 3ff911e..9c6ac4b 100644
--- a/arch/sparc/prom/init_64.c
+++ b/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 @@
 	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");