ARM: rockchip: Fix secondary CPU startup in thumb2 kernel

The secondary CPU starts up in ARM mode. When the kernel is compiled in
thumb2 mode we have to explicitly compile the secondary startup
trampoline in ARM mode.

Change-Id: I52d2167ab4c4e1da5ac1a800390ab04ba724dd72
Signed-off-by: Tao Huang <huangtao@rock-chips.com>

Author: rkhuangtao

arch/arm/mach-rockchip/headsmp.S

@@ -15,6 +15,8 @@
 #include <linux/linkage.h>
 #include <linux/init.h>
 
+	.arm
+
 ENTRY(rockchip_secondary_trampoline)
 	ldr	pc, 1f
 ENDPROC(rockchip_secondary_trampoline)