ppc/85xx: make boot from NAND full relocation to RAM

Take advantage of the latest full relocation commit of PPC platform
for boot from NAND.

Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>

cpu/mpc85xx/u-boot-nand.lds

@@ -58,7 +58,6 @@ SECTIONS
   .text      :
   {
     *(.text)
-    *(.fixup)
     *(.got1)
    } :text
     _etext = .;