signal/blackfin: Move the blackfin specific si_codes to asm-generic/siginfo.h

Having si_codes in many different files simply encourages duplicate definitions
that can cause problems later.  To avoid that merge the blackfin specific si_codes
into uapi/asm-generic/siginfo.h

Update copy_siginfo_to_user to copy with the absence of BUS_MCEERR_AR that blackfin
defines to be something else.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
diff --git a/kernel/signal.c b/kernel/signal.c
index 47c87b1..4c3f444 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2770,13 +2770,16 @@ int copy_siginfo_to_user(siginfo_t __user *to, const siginfo_t *from)
 		err |= __put_user(from->si_flags, &to->si_flags);
 		err |= __put_user(from->si_isr, &to->si_isr);
 #endif
-#ifdef BUS_MCEERR_AO
 		/*
 		 * Other callers might not initialize the si_lsb field,
 		 * so check explicitly for the right codes here.
 		 */
-		if (from->si_signo == SIGBUS &&
-		    (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO))
+#ifdef BUS_MCEERR_AR
+		if (from->si_signo == SIGBUS && from->si_code == BUS_MCEERR_AR)
+			err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);
+#endif
+#ifdef BUS_MCEERR_AO
+		if (from->si_signo == SIGBUS && from->si_code == BUS_MCEERR_AO)
 			err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);
 #endif
 #ifdef SEGV_BNDERR