mmc: (cosmetic) remove "extern" from function declarations

The "extern" keyword isn't required in function declarations, remove it.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index bf93c9a..d6f20cc 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -364,10 +364,10 @@
 	unsigned long		private[0] ____cacheline_aligned;
 };
 
-extern struct mmc_host *mmc_alloc_host(int extra, struct device *);
-extern int mmc_add_host(struct mmc_host *);
-extern void mmc_remove_host(struct mmc_host *);
-extern void mmc_free_host(struct mmc_host *);
+struct mmc_host *mmc_alloc_host(int extra, struct device *);
+int mmc_add_host(struct mmc_host *);
+void mmc_remove_host(struct mmc_host *);
+void mmc_free_host(struct mmc_host *);
 void mmc_of_parse(struct mmc_host *host);
 
 static inline void *mmc_priv(struct mmc_host *host)
@@ -381,16 +381,16 @@
 #define mmc_classdev(x)	(&(x)->class_dev)
 #define mmc_hostname(x)	(dev_name(&(x)->class_dev))
 
-extern int mmc_suspend_host(struct mmc_host *);
-extern int mmc_resume_host(struct mmc_host *);
+int mmc_suspend_host(struct mmc_host *);
+int mmc_resume_host(struct mmc_host *);
 
-extern int mmc_power_save_host(struct mmc_host *host);
-extern int mmc_power_restore_host(struct mmc_host *host);
+int mmc_power_save_host(struct mmc_host *host);
+int mmc_power_restore_host(struct mmc_host *host);
 
-extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
-extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
+void mmc_detect_change(struct mmc_host *, unsigned long delay);
+void mmc_request_done(struct mmc_host *, struct mmc_request *);
 
-extern int mmc_cache_ctrl(struct mmc_host *, u8);
+int mmc_cache_ctrl(struct mmc_host *, u8);
 
 static inline void mmc_signal_sdio_irq(struct mmc_host *host)
 {