[PATCH] csky: Fixup compile error

[guoren]

From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>

Add header file for asmlinkage macro.

Error log:
In file included from arch/csky/include/asm/ptrace.h:7,
                 from arch/csky/include/asm/elf.h:6,
                 from include/linux/elf.h:6,
                 from kernel/extable.c:6:
arch/csky/include/asm/traps.h:43:11: error: expected ';' before 'void'
   43 | asmlinkage void do_trap_unknown(struct pt_regs *regs);
      |           ^~~~~

Fixes: c8171a86b274 ("csky: Fixup -Wmissing-prototypes warning")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
---
 arch/csky/include/asm/traps.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/csky/include/asm/traps.h b/arch/csky/include/asm/traps.h
index 1e7d303b91e9..732c4aaa2e26 100644
--- a/arch/csky/include/asm/traps.h
+++ b/arch/csky/include/asm/traps.h
@@ -3,6 +3,8 @@
 #ifndef __ASM_CSKY_TRAPS_H
 #define __ASM_CSKY_TRAPS_H
 
+#include <linux/linkage.h>
+
 #define VEC_RESET	0
 #define VEC_ALIGN	1
 #define VEC_ACCESS	2
-- 
2.36.1