MIPS: ath25: add UART support

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/8242/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/ath25/ar2315.h

@@ -6,12 +6,14 @@
 void ar2315_arch_init_irq(void);
 void ar2315_plat_time_init(void);
 void ar2315_plat_mem_setup(void);
+void ar2315_arch_init(void);
 
 #else
 
 static inline void ar2315_arch_init_irq(void) {}
 static inline void ar2315_plat_time_init(void) {}
 static inline void ar2315_plat_mem_setup(void) {}
+static inline void ar2315_arch_init(void) {}
 
 #endif