ARM: restart: omap: use new restart hook

Hook these platforms restart code into the new restart hook rather
than using arch_reset().

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-omap2/common.h

@@ -84,6 +84,7 @@ void omap3_init_early(void);	/* Do not use this one */
 void am35xx_init_early(void);
 void ti816x_init_early(void);
 void omap4430_init_early(void);
+void omap_prcm_restart(char, const char *);
 
 /*
  * IO bases for various OMAP processors