omap: Fix sev instruction usage for multi-omap

Otherwise we get the following error with omap3_defconfig and CONFIG_SMP:

Error: selected processor does not support `sev'
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

arch/arm/mach-omap2/Makefile

@@ -25,6 +25,7 @@ obj-$(CONFIG_LOCAL_TIMERS)		+= timer-mpu.o
 obj-$(CONFIG_HOTPLUG_CPU)		+= omap-hotplug.o
 obj-$(CONFIG_ARCH_OMAP4)		+= omap44xx-smc.o omap4-common.o
 
+AFLAGS_omap-headsmp.o			:=-Wa,-march=armv7-a
 AFLAGS_omap44xx-smc.o			:=-Wa,-march=armv7-a
 
 # Functions loaded to SRAM

arch/arm/mach-omap2/omap-smp.c

@@ -102,8 +102,7 @@ static void __init wakeup_secondary(void)
 	 * Send a 'sev' to wake the secondary core from WFE.
 	 * Drain the outstanding writes to memory
 	 */
-	dsb();
-	set_event();
+	dsb_sev();
 	mb();
 }
 

arch/arm/plat-omap/include/plat/smp.h

@@ -19,13 +19,6 @@
 
 #include <asm/hardware/gic.h>
 
-/*
- * set_event() is used to wake up secondary core from wfe using sev. ROM
- * code puts the second core into wfe(standby).
- *
- */
-#define set_event()	__asm__ __volatile__ ("sev" : : : "memory")
-
 /* Needed for secondary core boot */
 extern void omap_secondary_startup(void);
 extern u32 omap_modify_auxcoreboot0(u32 set_mask, u32 clear_mask);