ARM: ux500: add missing ENDPROC to headsmp.S

Once the ENDPROC is in place, BSYM() in not longer necessary
to get correct pointer to u8500_secondary_startup().
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Linus Walleij <linus.walleij@stericsson.com>

arch/arm/mach-ux500/headsmp.S

@@ -32,6 +32,8 @@ pen:	ldr	r7, [r6]
 	 * should now contain the SVC stack for this core
 	 */
 	b	secondary_startup
+ENDPROC(u8500_secondary_startup)
 
+	.align 2
 1:	.long	.
 	.long	pen_release