canmb board: Fix compiler warnings

Recent changes caused thatthe aev board now is included in the boards
built by MAKEALL, which revealed that compilation for this board
has been broken for a long time:

canmb.c: In function 'initdram':
canmb.c:109: warning: pointer targets in passing argument 1 of 'get_ram_size' differ in signedness
canmb.c:111: warning: pointer targets in passing argument 1 of 'get_ram_size' differ in signedness
canmb.c:137: warning: pointer targets in passing argument 1 of 'get_ram_size' differ in signedness
canmb.c:140: warning: pointer targets in passing argument 1 of 'get_ram_size' differ in signedness

Fix these.

Signed-off-by: Wolfgang Denk <wd@denx.de>

board/canmb/canmb.c

@@ -106,9 +106,9 @@ phys_size_t initdram (int board_type)
 
 	/* find RAM size using SDRAM CS0 only */
 	sdram_start(0);
-	test1 = get_ram_size((ulong *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
+	test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
 	sdram_start(1);
-	test2 = get_ram_size((ulong *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
+	test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
 	if (test1 > test2) {
 		sdram_start(0);
 		dramsize = test1;
@@ -134,10 +134,10 @@ phys_size_t initdram (int board_type)
 	/* find RAM size using SDRAM CS1 only */
 	if (!dramsize)
 		sdram_start(0);
-	test2 = test1 = get_ram_size((ulong *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
+	test2 = test1 = get_ram_size((long *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
 	if (!dramsize) {
 		sdram_start(1);
-		test2 = get_ram_size((ulong *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
+		test2 = get_ram_size((long *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
 	}
 	if (test1 > test2) {
 		sdram_start(0);