system/core LP64 cleanup.

Fixes -Wint-to-pointer and -Wpointer-to-int warnings, plus various -Wformat
warnings.

Change-Id: I6c5eea6b4273d82d28b8e5d2925f3e5457511b17
diff --git a/fastbootd/commands.c b/fastbootd/commands.c
index 063e1a6..98b7866 100644
--- a/fastbootd/commands.c
+++ b/fastbootd/commands.c
@@ -124,9 +124,9 @@
         goto error;
     }
 
-    kernel_ptr = (void *)((unsigned) ptr + hdr->page_size);
-    ramdisk_ptr = (void *)((unsigned) kernel_ptr + kernel_actual);
-    second_ptr = (void *)((unsigned) ramdisk_ptr + ramdisk_actual);
+    kernel_ptr = (void *)((uintptr_t) ptr + hdr->page_size);
+    ramdisk_ptr = (void *)((uintptr_t) kernel_ptr + kernel_actual);
+    second_ptr = (void *)((uintptr_t) ramdisk_ptr + ramdisk_actual);
 
     D(INFO, "preparing to boot");
     // Prepares boot physical address. Addresses from header are ignored