ARM: 6539/1: ux500: remove unnecessary barrier from the secondary startup

Signed-off-by: Nsrinidhi kasagar <srinidhi.kasagar@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-ux500/headsmp.S

@@ -23,7 +23,6 @@ ENTRY(u8500_secondary_startup)
 	ldmia	r4, {r5, r6}
 	sub	r4, r4, r5
 	add	r6, r6, r4
-	dsb
 pen:	ldr	r7, [r6]
 	cmp	r7, r0
 	bne	pen