ARM: OMAP2+: PRM: provide generic API for system reset

This patch combines the various prm_warm_reset calls under a common
API prm_reset_system, and adds the SoC specific implementation under
prm_ll_data.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/omap3-restart.c

@@ -14,10 +14,8 @@
 #include <linux/init.h>
 #include <linux/reboot.h>
 
-#include "iomap.h"
-#include "common.h"
 #include "control.h"
-#include "prm3xxx.h"
+#include "prm.h"
 
 /* Global address base setup code */
 
@@ -32,6 +30,5 @@
 void omap3xxx_restart(enum reboot_mode mode, const char *cmd)
 {
 	omap3_ctrl_write_boot_mode((cmd ? (u8)*cmd : 0));
-	omap3xxx_prm_dpll3_reset(); /* never returns */
-	while (1);
+	omap_prm_reset_system();
 }