clk: spear: Move prototype to accessible header

Fixes the following W=1 kernel build warning(s):

 drivers/clk/spear/spear6xx_clock.c:116:13: warning: no previous prototype for function 'spear6xx_clk_init' [-Wmissing-prototypes]
Reported-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

arch/arm/mach-spear/generic.h

@@ -25,11 +25,8 @@ extern struct pl022_ssp_controller pl022_plat_data;
 extern struct pl08x_platform_data pl080_plat_data;
 
 void __init spear_setup_of_timer(void);
-void __init spear3xx_clk_init(void __iomem *misc_base,
-			      void __iomem *soc_config_base);
 void __init spear3xx_map_io(void);
 void __init spear3xx_dt_init_irq(void);
-void __init spear6xx_clk_init(void __iomem *misc_base);
 void __init spear13xx_map_io(void);
 void __init spear13xx_l2x0_init(void);
 

arch/arm/mach-spear/spear3xx.c

@@ -13,6 +13,7 @@
 #include <linux/amba/pl022.h>
 #include <linux/amba/pl080.h>
 #include <linux/clk.h>
+#include <linux/clk/spear.h>
 #include <linux/io.h>
 #include <asm/mach/map.h>
 #include "pl080.h"

arch/arm/mach-spear/spear6xx.c

@@ -12,6 +12,7 @@
 
 #include <linux/amba/pl08x.h>
 #include <linux/clk.h>
+#include <linux/clk/spear.h>
 #include <linux/err.h>
 #include <linux/of.h>
 #include <linux/of_address.h>

drivers/clk/spear/spear3xx_clock.c

@@ -8,6 +8,7 @@
 
 #include <linux/clk.h>
 #include <linux/clkdev.h>
+#include <linux/clk/spear.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/of_platform.h>

drivers/clk/spear/spear6xx_clock.c

@@ -7,6 +7,7 @@
  */
 
 #include <linux/clkdev.h>
+#include <linux/clk/spear.h>
 #include <linux/io.h>
 #include <linux/spinlock_types.h>
 #include "clk.h"

include/linux/clk/spear.h

@@ -8,6 +8,20 @@
 #ifndef __LINUX_CLK_SPEAR_H
 #define __LINUX_CLK_SPEAR_H
 
+#ifdef CONFIG_ARCH_SPEAR3XX
+void __init spear3xx_clk_init(void __iomem *misc_base,
+			      void __iomem *soc_config_base);
+#else
+static inline void __init spear3xx_clk_init(void __iomem *misc_base,
+					    void __iomem *soc_config_base) {}
+#endif
+
+#ifdef CONFIG_ARCH_SPEAR6XX
+void __init spear6xx_clk_init(void __iomem *misc_base);
+#else
+static inline void __init spear6xx_clk_init(void __iomem *misc_base) {}
+#endif
+
 #ifdef CONFIG_MACH_SPEAR1310
 void __init spear1310_clk_init(void __iomem *misc_base, void __iomem *ras_base);
 #else