rtl818x: Replace mdelay() with msleep() in rtl8225se_rf_init

rtl8225se_rf_init() is never called in atomic context.
It calls mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep().
This patch only replaces the mdelay() that has >20ms time to wait.

This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c

@@ -363,7 +363,7 @@ void rtl8225se_rf_init(struct ieee80211_hw *dev)
 	rtl8187se_rf_writereg(dev, 0x00, 0x0037); mdelay(11);
 	rtl8187se_rf_writereg(dev, 0x04, 0x0160); mdelay(11);
 	rtl8187se_rf_writereg(dev, 0x07, 0x0080); mdelay(11);
-	rtl8187se_rf_writereg(dev, 0x02, 0x088D); mdelay(221);
+	rtl8187se_rf_writereg(dev, 0x02, 0x088D); msleep(221);
 	rtl8187se_rf_writereg(dev, 0x00, 0x0137); mdelay(11);
 	rtl8187se_rf_writereg(dev, 0x07, 0x0000); mdelay(1);
 	rtl8187se_rf_writereg(dev, 0x07, 0x0180); mdelay(1);
@@ -386,7 +386,7 @@ void rtl8225se_rf_init(struct ieee80211_hw *dev)
 	rtl8187se_rf_writereg(dev, 0x00, 0x00BF); mdelay(1);
 	rtl8187se_rf_writereg(dev, 0x0D, 0x08DF); mdelay(1);
 	rtl8187se_rf_writereg(dev, 0x02, 0x004D); mdelay(1);
-	rtl8187se_rf_writereg(dev, 0x04, 0x0975); mdelay(31);
+	rtl8187se_rf_writereg(dev, 0x04, 0x0975); msleep(31);
 	rtl8187se_rf_writereg(dev, 0x00, 0x0197); mdelay(1);
 	rtl8187se_rf_writereg(dev, 0x05, 0x05AB); mdelay(1);