Change initdram() return type to phys_size_t

This patch changes the return type of initdram() from long int to phys_size_t.
This is required for a couple of reasons: long int limits the amount of dram
to 2GB, and u-boot in general is moving over to phys_size_t to represent the
size of physical memory.  phys_size_t is defined as an unsigned long on almost
all current platforms.

This patch *only* changes the return type of the initdram function (in
include/common.h, as well as in each board's implementation of initdram).  It
does not actually modify the code inside the function on any of the platforms;
platforms which wish to support more than 2GB of DRAM will need to modify
their initdram() function code.

Build tested with MAKEALL for ppc, arm, mips, mips-el. Booted on powerpc
MPC8641HPCN.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
diff --git a/board/gaisler/gr_cpci_ax2000/gr_cpci_ax2000.c b/board/gaisler/gr_cpci_ax2000/gr_cpci_ax2000.c
index d99b455..105a747 100644
--- a/board/gaisler/gr_cpci_ax2000/gr_cpci_ax2000.c
+++ b/board/gaisler/gr_cpci_ax2000/gr_cpci_ax2000.c
@@ -22,7 +22,7 @@
 #include <config.h>
 #include <asm/leon.h>
 
-long int initdram(int board_type)
+phys_size_t initdram(int board_type)
 {
 	return 1;
 }
diff --git a/board/gaisler/gr_ep2s60/gr_ep2s60.c b/board/gaisler/gr_ep2s60/gr_ep2s60.c
index e8617f0..2904d32 100644
--- a/board/gaisler/gr_ep2s60/gr_ep2s60.c
+++ b/board/gaisler/gr_ep2s60/gr_ep2s60.c
@@ -22,7 +22,7 @@
 #include <config.h>
 #include <asm/leon.h>
 
-long int initdram(int board_type)
+phys_size_t initdram(int board_type)
 {
 	return 1;
 }
diff --git a/board/gaisler/gr_xc3s_1500/gr_xc3s_1500.c b/board/gaisler/gr_xc3s_1500/gr_xc3s_1500.c
index 1ee7024..fc8cf84 100644
--- a/board/gaisler/gr_xc3s_1500/gr_xc3s_1500.c
+++ b/board/gaisler/gr_xc3s_1500/gr_xc3s_1500.c
@@ -22,7 +22,7 @@
 #include <config.h>
 #include <asm/leon.h>
 
-long int initdram(int board_type)
+phys_size_t initdram(int board_type)
 {
 	return 1;
 }
diff --git a/board/gaisler/grsim/grsim.c b/board/gaisler/grsim/grsim.c
index 70a2f23..deccd3d 100644
--- a/board/gaisler/grsim/grsim.c
+++ b/board/gaisler/grsim/grsim.c
@@ -26,7 +26,7 @@
 #include <common.h>
 #include <asm/leon.h>
 
-long int initdram(int board_type)
+phys_size_t initdram(int board_type)
 {
 	return 1;
 }
diff --git a/board/gaisler/grsim_leon2/grsim_leon2.c b/board/gaisler/grsim_leon2/grsim_leon2.c
index 55dfe82..61445fe 100644
--- a/board/gaisler/grsim_leon2/grsim_leon2.c
+++ b/board/gaisler/grsim_leon2/grsim_leon2.c
@@ -26,7 +26,7 @@
 #include <common.h>
 #include <asm/leon.h>
 
-long int initdram(int board_type)
+phys_size_t initdram(int board_type)
 {
 	return 1;
 }