ARM: OMAP2+: Fix uninitialized sr_inst

Fix uninitialized sr_inst.

Fixes: fbfa463b ("ARM: OMAP2+: Fix smartreflex init regression after dropping legacy data")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/sr_device.c

@@ -188,7 +188,7 @@ static const char * const dra7_sr_instances[] = {
 
 int __init omap_devinit_smartreflex(void)
 {
-	const char * const *sr_inst;
+	const char * const *sr_inst = NULL;
 	int i, nr_sr = 0;
 
 	if (soc_is_omap44xx()) {