loader: fix powerpc64le ofw loader

This is similar to 5d48fb3b16.
With LLVM14 the .data.rel.ro ELF section appears after .data,
making loader behave erractly and kernel is not loaded.
This patch makes ensures the correct order.

Based on discussion at:
            https://github.com/llvm/llvm-project/issues/56306

MFC after:	1 day
Sponsored by:	Instituto de Pesquisas Eldorado (eldorado.org.br)

stand/powerpc/ofw/ldscript.powerpcle

@@ -57,6 +57,7 @@ SECTIONS
   .sbss2     : { *(.sbss2)   }
   /* Adjust the address for the data segment to the next page up. */
   . = ((. + 0x1000) & ~(0x1000 - 1));
+  .data.rel.ro : { *(.data.rel.ro*) }
   .data    :
   {
     *(.data)