PXA: Squash extern pxa_dram_init()

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
diff --git a/board/pxa255_idp/pxa_idp.c b/board/pxa255_idp/pxa_idp.c
index 804d09c..7b975f6 100644
--- a/board/pxa255_idp/pxa_idp.c
+++ b/board/pxa255_idp/pxa_idp.c
@@ -34,6 +34,7 @@
 #include <netdev.h>
 #include <command.h>
 #include <asm/io.h>
+#include <asm/arch/pxa.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -83,7 +84,6 @@
 	return 0;
 }
 
-extern void pxa_dram_init(void);
 int dram_init(void)
 {
 	pxa_dram_init();