Blackfin: SMP: avoid section mismatch warnings

Since coreb_trampoline_start() calls coreb_start(), they need to be in
the same section.
Signed-off-by: NSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

arch/blackfin/mach-bf561/secondary.S

@@ -196,7 +196,7 @@ ENTRY(_coreb_sleep)
 	jump (p0);
 ENDPROC(_coreb_sleep)
 
-__CPUINIT
+__INIT
 ENTRY(_coreb_start)
 	[--sp] = reti;