wl18xx: add checks on wl18xx_top_reg_write() return value

Check return value from call to wl18xx_top_reg_write(),
so in case of error jump to goto label out and return.

Also, remove unnecessary value check before goto label out.

Addresses-Coverity-ID: 1226938
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ti/wl18xx/main.c

@@ -793,9 +793,13 @@ static int wl18xx_set_clk(struct wl1271 *wl)
 		ret = wl18xx_top_reg_write(wl, PLLSH_WCS_PLL_P_FACTOR_CFG_2,
 					(wl18xx_clk_table[clk_freq].p >> 16) &
 					PLLSH_WCS_PLL_P_FACTOR_CFG_2_MASK);
+		if (ret < 0)
+			goto out;
 	} else {
 		ret = wl18xx_top_reg_write(wl, PLLSH_WCS_PLL_SWALLOW_EN,
 					   PLLSH_WCS_PLL_SWALLOW_EN_VAL2);
+		if (ret < 0)
+			goto out;
 	}
 
 	/* choose WCS PLL */
@@ -819,8 +823,6 @@ static int wl18xx_set_clk(struct wl1271 *wl)
 	/* reset the swallowing logic */
 	ret = wl18xx_top_reg_write(wl, PLLSH_COEX_PLL_SWALLOW_EN,
 				   PLLSH_COEX_PLL_SWALLOW_EN_VAL2);
-	if (ret < 0)
-		goto out;
 
 out:
 	return ret;