greybus: arche-platform: Return immediately if in same state from state change fns

Have a check inside all individual operational state change functions
to check whether device is in same state, and if yes, then return
immediately.

Testing Done: Tested on DB3.5 platform
Signed-off-by: NVaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/arche-platform.c

@@ -133,6 +133,9 @@ static int arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdat
 {
 	int ret;
 
+	if (arche_pdata->state == ARCHE_PLATFORM_STATE_ACTIVE)
+		return 0;
+
 	dev_info(arche_pdata->dev, "Booting from cold boot state\n");
 
 	svc_reset_onoff(arche_pdata->svc_reset_gpio,
@@ -159,6 +162,9 @@ static int arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdat
 
 static void arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata)
 {
+	if (arche_pdata->state == ARCHE_PLATFORM_STATE_FW_FLASHING)
+		return;
+
 	dev_info(arche_pdata->dev, "Switching to FW flashing state\n");
 
 	svc_reset_onoff(arche_pdata->svc_reset_gpio,
@@ -176,6 +182,9 @@ static void arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_
 
 static void arche_platform_poweroff_seq(struct arche_platform_drvdata *arche_pdata)
 {
+	if (arche_pdata->state == ARCHE_PLATFORM_STATE_OFF)
+		return;
+
 	/* Send disconnect/detach event to SVC */
 	gpio_set_value(arche_pdata->wake_detect_gpio, 0);
 	usleep_range(100, 200);