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/altera/dk1c20/dk1c20.c b/board/altera/dk1c20/dk1c20.c
index d0eb9ea..46695be 100644
--- a/board/altera/dk1c20/dk1c20.c
+++ b/board/altera/dk1c20/dk1c20.c
@@ -50,7 +50,7 @@
 	return 0;
 }
 
-long int initdram (int board_type)
+phys_size_t initdram (int board_type)
 {
 	return (0);
 }
diff --git a/board/altera/dk1s10/dk1s10.c b/board/altera/dk1s10/dk1s10.c
index c45e7f1..64d591e 100644
--- a/board/altera/dk1s10/dk1s10.c
+++ b/board/altera/dk1s10/dk1s10.c
@@ -54,7 +54,7 @@
 	return 0;
 }
 
-long int initdram (int board_type)
+phys_size_t initdram (int board_type)
 {
 	return (0);
 }
diff --git a/board/altera/ep1c20/ep1c20.c b/board/altera/ep1c20/ep1c20.c
index 2949139..c5bfb85 100644
--- a/board/altera/ep1c20/ep1c20.c
+++ b/board/altera/ep1c20/ep1c20.c
@@ -34,7 +34,7 @@
 	return 0;
 }
 
-long int initdram (int board_type)
+phys_size_t initdram (int board_type)
 {
 	return (0);
 }
diff --git a/board/altera/ep1s10/ep1s10.c b/board/altera/ep1s10/ep1s10.c
index 9c7e28e..de9bf42 100644
--- a/board/altera/ep1s10/ep1s10.c
+++ b/board/altera/ep1s10/ep1s10.c
@@ -34,7 +34,7 @@
 	return 0;
 }
 
-long int initdram (int board_type)
+phys_size_t initdram (int board_type)
 {
 	return (0);
 }
diff --git a/board/altera/ep1s40/ep1s40.c b/board/altera/ep1s40/ep1s40.c
index cb75550..c0eca17 100644
--- a/board/altera/ep1s40/ep1s40.c
+++ b/board/altera/ep1s40/ep1s40.c
@@ -29,7 +29,7 @@
 	return 0;
 }
 
-long int initdram (int board_type)
+phys_size_t initdram (int board_type)
 {
 	return (0);
 }