arm: omap: rename board-rx51-sdram.c to sdram-nokia.c

Rename the file and functions so that it can be reused by future Nokia
boards. Based on patches by Juha Keski-Saari.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c
index 36f2cf4..904b83a 100644
--- a/arch/arm/mach-omap2/board-rx51.c
+++ b/arch/arm/mach-omap2/board-rx51.c
@@ -35,7 +35,7 @@
 
 #define RX51_GPIO_SLEEP_IND 162
 
-struct omap_sdrc_params *rx51_get_sdram_timings(void);
+struct omap_sdrc_params *nokia_get_sdram_timings(void);
 extern void rx51_video_mem_init(void);
 
 static struct gpio_led gpio_leds[] = {
@@ -105,7 +105,7 @@
 	omap_board_config = rx51_config;
 	omap_board_config_size = ARRAY_SIZE(rx51_config);
 	omap3_pm_init_cpuidle(rx51_cpuidle_params);
-	sdrc_params = rx51_get_sdram_timings();
+	sdrc_params = nokia_get_sdram_timings();
 	omap2_init_common_hw(sdrc_params, sdrc_params);
 	omap_init_irq();
 	omap_gpio_init();