mips/ath25: remove legacy __cpuinit section that crept in

We removed __cpuinit support (leaving no-op stubs) quite some time ago.
However this one crept back in as of commit 43cc739f
("MIPS: ath25: add common parts")

Since we want to clobber the stubs soon, get this removed now.

Cc: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Acked-by: NSergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: linux-mips@linux-mips.org
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

arch/mips/ath25/board.c

@@ -216,7 +216,7 @@ void __init plat_time_init(void)
 		ar2315_plat_time_init();
 }
 
-unsigned int __cpuinit get_c0_compare_int(void)
+unsigned int get_c0_compare_int(void)
 {
 	return CP0_LEGACY_COMPARE_IRQ;
 }