[MIPS] make mips_ejtag_setup() static

This change makes the needlessly global function mips_ejtag_setup() static.

Successfully build-tested using default configs for Malta, Atlas
and SEAD boards.

Runtime test successfully performed by booting the Malta 4Kc board
up to the shell prompt.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/mips-boards/generic/init.c

@@ -238,7 +238,7 @@ static void __init mips_nmi_setup(void)
 	flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
 }
 
-void __init mips_ejtag_setup(void)
+static void __init mips_ejtag_setup(void)
 {
 	void *base;
 	extern char except_vec_ejtag_debug;