sdhci: handle built-in sdhci with modular leds class

As reported by Randy Dunlap, having sdhci built-in and LEDs class
as a module resulted in undefined symbols. Change the code to handle
that case properly (by not having LEDs class support in sdhci).

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

drivers/mmc/host/sdhci.c

@@ -30,6 +30,11 @@
 #define DBG(f, x...) \
 	pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
 
+#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
+	defined(CONFIG_MMC_SDHCI_MODULE))
+#define SDHCI_USE_LEDS_CLASS
+#endif
+
 static unsigned int debug_quirks = 0;
 
 static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
@@ -149,7 +154,7 @@ static void sdhci_deactivate_led(struct sdhci_host *host)
 	writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 }
 
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#ifdef SDHCI_USE_LEDS_CLASS
 static void sdhci_led_control(struct led_classdev *led,
 	enum led_brightness brightness)
 {
@@ -994,7 +999,7 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 
 	WARN_ON(host->mrq != NULL);
 
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#ifndef SDHCI_USE_LEDS_CLASS
 	sdhci_activate_led(host);
 #endif
 
@@ -1201,7 +1206,7 @@ static void sdhci_tasklet_finish(unsigned long param)
 	host->cmd = NULL;
 	host->data = NULL;
 
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#ifndef SDHCI_USE_LEDS_CLASS
 	sdhci_deactivate_led(host);
 #endif
 
@@ -1717,7 +1722,7 @@ int sdhci_add_host(struct sdhci_host *host)
 	sdhci_dumpregs(host);
 #endif
 
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#ifdef SDHCI_USE_LEDS_CLASS
 	host->led.name = mmc_hostname(mmc);
 	host->led.brightness = LED_OFF;
 	host->led.default_trigger = mmc_hostname(mmc);
@@ -1739,7 +1744,7 @@ int sdhci_add_host(struct sdhci_host *host)
 
 	return 0;
 
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#ifdef SDHCI_USE_LEDS_CLASS
 reset:
 	sdhci_reset(host, SDHCI_RESET_ALL);
 	free_irq(host->irq, host);
@@ -1775,7 +1780,7 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
 
 	mmc_remove_host(host->mmc);
 
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#ifdef SDHCI_USE_LEDS_CLASS
 	led_classdev_unregister(&host->led);
 #endif