OMAP2/3: SDRC: fix walking of SDRC params list

This patch fixes a bug where omap2_sdrc_get_params() does not properly
check for a valid table entry before continuing.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/sdrc.c

@@ -58,7 +58,7 @@ struct omap_sdrc_params *omap2_sdrc_get_params(unsigned long r)
 
 	sp = sdrc_init_params;
 
-	while (sp->rate != r)
+	while (sp->rate && sp->rate != r)
 		sp++;
 
 	if (!sp->rate)