MIPS: PNX833x: Remove unused prom_getcmdline()

Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/885/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/nxp/pnx833x/common/prom.c

@@ -62,8 +62,3 @@ char __init *prom_getenv(char *envname)
 void __init prom_free_prom_memory(void)
 {
 }
-
-char * __init prom_getcmdline(void)
-{
-	return arcs_cmdline;
-}