sparc32: fix sparse warnings in unaligned_32.c

Fix following warnings:
unaligned_32.c:146:15: warning: symbol 'safe_compute_effective_address' was not declared. Should it be static?
unaligned_32.c:235:17: warning: symbol 'kernel_unaligned_trap' was not declared. Should it be static?
unaligned_32.c:319:17: warning: symbol 'user_unaligned_trap' was not declared. Should it be static?

Add proper declarations in kernel.h + setup.h

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/setup.h b/arch/sparc/include/asm/setup.h
index 622145b..fb54505 100644
--- a/arch/sparc/include/asm/setup.h
+++ b/arch/sparc/include/asm/setup.h
@@ -42,6 +42,9 @@
 /* devices.c */
 void __init device_scan(void);
 
+/* unaligned_32.c */
+unsigned long safe_compute_effective_address(struct pt_regs *, unsigned int);
+
 #endif
 
 extern void sun_do_break(void);