powerpc/44x: Removing dead CONFIG_PPC47x

CONFIG_PPC47x doesn't exist in Kconfig and no 476 processor calls this
function ppc44x_pin_tlb() as it has it's own ppc47x_pin_tlb().

This code is probably an artifact of the original 476 code that
shouldn't have made it upstream.
Signed-off-by: Christoph Egger <siccegge@cs.fau.de>
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>

arch/powerpc/mm/44x_mmu.c

@@ -78,11 +78,7 @@ static void __init ppc44x_pin_tlb(unsigned int virt, unsigned int phys)
 		"tlbwe	%1,%3,%5\n"
 		"tlbwe	%0,%3,%6\n"
 	:
-#ifdef CONFIG_PPC47x
-	: "r" (PPC47x_TLB2_S_RWX),
-#else
 	: "r" (PPC44x_TLB_SW | PPC44x_TLB_SR | PPC44x_TLB_SX | PPC44x_TLB_G),
-#endif
 	  "r" (phys),
 	  "r" (virt | PPC44x_TLB_VALID | PPC44x_TLB_256M),
 	  "r" (entry),