[Blackfin] arch: Delete unused (copied from m68k) entries in asm-offsets.c.

Fix some really ancient code that was correct only for the m68k port.
Delete unused (i.e. copied from m68k) entries in asm-offsets.c.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index b4f062c..f51ab08 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -185,8 +185,8 @@
 {
 	unsigned long tmp;
 	/* make sure the single step bit is not set. */
-	tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
-	put_reg(child, PT_SR, tmp);
+	tmp = get_reg(child, PT_SYSCFG) & ~TRACE_BITS;
+	put_reg(child, PT_SYSCFG, tmp);
 }
 
 long arch_ptrace(struct task_struct *child, long request, long addr, long data)