sparc: Do not export prom_nb{get,put}char().

Never used outside of console_{32,64}.c

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/prom/console_64.c b/arch/sparc/prom/console_64.c
index de67fc7..33a8b27 100644
--- a/arch/sparc/prom/console_64.c
+++ b/arch/sparc/prom/console_64.c
@@ -18,8 +18,7 @@
 /* Non blocking get character from console input device, returns -1
  * if no input was taken.  This can be used for polling.
  */
-inline int
-prom_nbgetchar(void)
+static int prom_nbgetchar(void)
 {
 	unsigned long args[7];
 	char inc;
@@ -42,8 +41,7 @@
 /* Non blocking put character to console device, returns -1 if
  * unsuccessful.
  */
-inline int
-prom_nbputchar(char c)
+static int prom_nbputchar(char c)
 {
 	unsigned long args[7];
 	char outc;