arm/omap: Replace board_ref_clock with enum values

Use the enum for board_ref_clock from linux/wl12xx.h
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Cc: linux-omap@vger.kernel.org
Reviewed-by: Pankaj Jangra<jangra.pankaj9@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-omap4panda.c

@@ -247,8 +247,7 @@ static struct platform_device omap_vwlan_device = {
 };
 
 static struct wl12xx_platform_data omap_panda_wlan_data  __initdata = {
-	/* PANDA ref clock is 38.4 MHz */
-	.board_ref_clock = 2,
+	.board_ref_clock = WL12XX_REFCLOCK_38, /* 38.4 MHz */
 };
 
 static struct twl6040_codec_data twl6040_codec = {

arch/arm/mach-omap2/board-zoom-peripherals.c

@@ -194,8 +194,7 @@ static struct platform_device omap_vwlan_device = {
 };
 
 static struct wl12xx_platform_data omap_zoom_wlan_data __initdata = {
-	/* ZOOM ref clock is 26 MHz */
-	.board_ref_clock = 1,
+	.board_ref_clock = WL12XX_REFCLOCK_26, /* 26 MHz */
 };
 
 static struct omap2_hsmmc_info mmc[] = {