AMD fam10: Link southbridge/amd/rs780/early_setup.c

Removes rs780_before_pci_init() since it was a no-op anyway.

Removes get_nb_rev() since this function is provided via a macro in
the header.

This Makes a lot of function non-static since the header has
prototypes for these.

Change-Id: I8933516771d959583bbd59a5c1beee3e30a7004f
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/20297
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/mainboard/iei/kino-780am2-fam10/romstage.c

@@ -46,7 +46,7 @@
 #include <cpu/amd/family_10h-family_15h/init_cpus.h>
 #include <arch/early_variables.h>
 #include <cbmem.h>
-#include "southbridge/amd/rs780/early_setup.c"
+#include <southbridge/amd/rs780/rs780.h>
 
 #include "resourcemap.c"
 #include "cpu/amd/quadcore/quadcore.c"
@@ -214,7 +214,6 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 
 //	die("After MCT init before CAR disabled.");
 
-	rs780_before_pci_init();
 	sb7xx_51xx_before_pci_init();
 
 	post_code(0x42);