mm/early_ioremap.c: use %pa to print resource_size_t variables

mm/early_ioremap.c: use %pa to print resource_size_t variables

%pa takes into consideration the special types such as resource_size_t.
Use this specifier %instead of explicit casting.

Link: http://lkml.kernel.org/r/20191209165413.56263-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>