pci: move pciauto_config_init() to pci.h

Fixing build regressions for the Integrator I get find that a few
boards try to work around the missing declaration of
pciauto_config_init() by declaring it in the local scope. This
does not make sense when the sibling functions are in <pci.h>
so move the function to the header, ridding the build error
in the Integrator and getting rid of the local declarations
here and there.

Reported-by:  Wolfgang Denk <wd@denx.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

board/esd/cpci750/pci.c

@@ -29,7 +29,6 @@
 #include <pci.h>
 
 #ifdef CONFIG_PCI_PNP
-void pciauto_config_init(struct pci_controller *hose);
 int  pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned int *bar);
 #endif
 

board/prodrive/p3mx/pci.c

@@ -29,7 +29,6 @@
 #include <pci.h>
 
 #ifdef CONFIG_PCI_PNP
-void pciauto_config_init(struct pci_controller *hose);
 int  pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned int *bar);
 #endif
 

drivers/pci/fsl_pci_init.c

@@ -51,7 +51,6 @@ void pciauto_prescan_setup_bridge(struct pci_controller *hose,
 				pci_dev_t dev, int sub_bus);
 void pciauto_postscan_setup_bridge(struct pci_controller *hose,
 				pci_dev_t dev, int sub_bus);
-void pciauto_config_init(struct pci_controller *hose);
 
 #ifndef CONFIG_SYS_PCI_MEMORY_BUS
 #define CONFIG_SYS_PCI_MEMORY_BUS 0

drivers/pci/pci.c

@@ -516,7 +516,6 @@ void pci_cfgfunc_do_nothing(struct pci_controller *hose,
  * to get the correct result when scanning bridges
  */
 extern int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);
-extern void pciauto_config_init(struct pci_controller *hose);
 
 #if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI_SCAN_SHOW)
 const char * pci_class_str(u8 class)

include/pci.h

@@ -527,6 +527,7 @@ extern void pciauto_setup_device(struct pci_controller *hose,
 				 struct pci_region *mem,
 				 struct pci_region *prefetch,
 				 struct pci_region *io);
+extern void pciauto_config_init(struct pci_controller *hose);
 int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);
 
 extern pci_dev_t pci_find_device (unsigned int vendor, unsigned int device, int index);