ARM: OMAP2+: gpmc: make gpmc_cs_get_name() static

Fix sparse warning:
  warning: symbol 'gpmc_cs_get_name' was not declared. Should it be static?

Signed-off-by: Semen Protsenko <semen.protsenko@globallogic.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>

drivers/memory/omap-gpmc.c

@@ -668,7 +668,7 @@ static void gpmc_cs_set_name(int cs, const char *name)
 	gpmc->name = name;
 }
 
-const char *gpmc_cs_get_name(int cs)
+static const char *gpmc_cs_get_name(int cs)
 {
 	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];