ARM: 7125/1: Add unwinding annotations for 64bit division functions

The 64bit division functions never had unwinding annotations
added. This prevents a backtrace from being printed within
the function and if a division by 0 occurs. Add the annotations.

Signed-off-by: Laura Abbott <[e-mail]>
Acked-by: Nicolas Pitre <[e-mail]>
Acked-by: Catalin Marinas <[e-mail]>
Signed-off-by: Russell King <[e-mail]>

arch/arm/lib/div64.S

···
  */
 
 #include <linux/linkage.h>
+#include <asm/unwind.h>
 
 #ifdef __ARMEB__
 #define xh r0
···
  */
 
 ENTRY(__do_div64)
+UNWIND(.fnstart)
 
 	@ Test for easy paths first.
 	subs	ip, r4, #1
···
 	moveq	yh, xh
 	moveq	xh, #0
 	moveq	pc, lr
+UNWIND(.fnend)
 
+UNWIND(.fnstart)
+UNWIND(.pad #4)
+UNWIND(.save {lr})
+Ldiv0_64:
 	@ Division by 0:
 	str	lr, [sp, #-8]!
 	bl	__div0
···
 	mov	xh, #0
 	ldr	pc, [sp], #8
 
+UNWIND(.fnend)
 ENDPROC(__do_div64)