86xx: Make dram_size a phys_size_t

It's currently a long and should be phys_size_t.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
diff --git a/board/freescale/mpc8641hpcn/mpc8641hpcn.c b/board/freescale/mpc8641hpcn/mpc8641hpcn.c
index 5af5c4b..d6a0a56 100644
--- a/board/freescale/mpc8641hpcn/mpc8641hpcn.c
+++ b/board/freescale/mpc8641hpcn/mpc8641hpcn.c
@@ -33,7 +33,7 @@
 
 #include "../common/pixis.h"
 
-long int fixed_sdram(void);
+phys_size_t fixed_sdram(void);
 
 int board_early_init_f(void)
 {
@@ -53,7 +53,7 @@
 phys_size_t
 initdram(int board_type)
 {
-	long dram_size = 0;
+	phys_size_t dram_size = 0;
 
 #if defined(CONFIG_SPD_EEPROM)
 	dram_size = fsl_ddr_sdram();
@@ -75,7 +75,7 @@
 /*
  * Fixed sdram init -- doesn't use serial presence detect.
  */
-long int
+phys_size_t
 fixed_sdram(void)
 {
 #if !defined(CONFIG_SYS_RAMBOOT)