Blackfin: fix typo in ptrace poking

Commit c014e15a2f667f9 (Blackfin: convert ptrace to new memory functions)
introduced a copy & paste typo in the ptrace poke data/text handling.  The
access_process_vm() function call was telling it to read instead of write.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 0982b5d..56b0ba1 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -315,7 +315,7 @@
 			case BFIN_MEM_ACCESS_CORE:
 			case BFIN_MEM_ACCESS_CORE_ONLY:
 				copied = access_process_vm(child, addr, &data,
-				                           to_copy, 0);
+				                           to_copy, 1);
 				if (copied)
 					break;