PXA: Squash extern pxa_dram_init()

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
diff --git a/board/balloon3/balloon3.c b/board/balloon3/balloon3.c
index 26e34e9..ebee5e1 100644
--- a/board/balloon3/balloon3.c
+++ b/board/balloon3/balloon3.c
@@ -21,6 +21,7 @@
 
 #include <common.h>
 #include <asm/arch/hardware.h>
+#include <asm/arch/pxa.h>
 #include <serial.h>
 #include <asm/io.h>
 #include <spartan3.h>
@@ -57,7 +58,6 @@
 	return &serial_stuart_device;
 }
 
-extern void pxa_dram_init(void);
 int dram_init(void)
 {
 	pxa_dram_init();