wilc1000: fix chip wakeup sequence retry failure issue

Sometimes during iperf session with powersave enabled, the commands used
to fail. Mostly the clock status bit was available but when it fails
then wakeup bit reset is required. Added delay before calling the wakeup
bit reset, to get the clock bit status correctly.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>

Author: ajaykathat

drivers/net/wireless/microchip/wilc1000/wlan.c

@@ -844,10 +844,14 @@ static void chip_wakeup_wilc3000(struct wilc *wilc, int source)
 		/* in case of failure, Reset the wakeup bit to introduce a new
 		 * edge on the next loop
 		 */
-		if ((clk_status_reg_val & clk_status_bit) == 0)
+		if ((clk_status_reg_val & clk_status_bit) == 0) {
 			hif_func->hif_write_reg(wilc, wakeup_reg,
 						wakeup_reg_val & (~wakeup_bit));
-	} while (((clk_status_reg_val & clk_status_bit) == 0) && (wake_seq_trials-- > 0));
+			/* added wait before wakeup sequence retry */
+			usleep_range(200, 300);
+		}
+	} while (((clk_status_reg_val & clk_status_bit) == 0)
+		 && (wake_seq_trials-- > 0));
 	if (!wake_seq_trials)
 		dev_err(wilc->dev, "clocks still OFF. Wake up failed\n");
 	wilc->keep_awake[source] = true;