cmd: efidebug: fix int to pointer cast

On 32 bit systems fix
warning: cast to pointer from integer of different size
[-Wint-to-pointer-cast]

Fixes: a415d61eac26 ("cmd: map addresses to sysmem in efidebug memmap")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/cmd/efidebug.c b/cmd/efidebug.c
index bb7c13d..c1bb764 100644
--- a/cmd/efidebug.c
+++ b/cmd/efidebug.c
@@ -489,10 +489,12 @@
 
 		printf("%-16s %.*llx-%.*llx", type,
 		       EFI_PHYS_ADDR_WIDTH,
-		       (u64)map_to_sysmem((void *)map->physical_start),
+		       (u64)map_to_sysmem((void *)(uintptr_t)
+					  map->physical_start),
 		       EFI_PHYS_ADDR_WIDTH,
-		       (u64)map_to_sysmem((void *)map->physical_start +
-					  map->num_pages * EFI_PAGE_SIZE));
+		       (u64)map_to_sysmem((void *)(uintptr_t)
+					  (map->physical_start +
+					   map->num_pages * EFI_PAGE_SIZE)));
 
 		print_memory_attributes(map->attribute);
 		putc('\n');