MIPS: Alchemy: remove declaration for set_cpuspec

set_cpuspec() has been dropped with commit 074cf656
("MIPS: Alchemy: remove cpu_table.") in late 2008.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/9150/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/alchemy/common/setup.c

@@ -34,7 +34,6 @@
 #include <au1000.h>
 
 extern void __init board_setup(void);
-extern void set_cpuspec(void);
 extern void __init alchemy_set_lpj(void);
 
 void __init plat_mem_setup(void)