powerpc/booke64: Guard e6500 tlb handler with CONFIG_PPC_FSL_BOOK3E

...and make CONFIG_PPC_FSL_BOOK3E conflict with CONFIG_PPC_64K_PAGES.

This fixes a build break with CONFIG_PPC_64K_PAGES on 64-bit book3e,
that was introduced by commit 28efc35fe68dacbddc4b12c2fa8f2df1593a4ad3
("powerpc/e6500: TLB miss handler with hardware tablewalk support").

Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index 735839b..b37a58e 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -557,10 +557,12 @@
 		patch_exception(0x1c0, exc_data_tlb_miss_htw_book3e);
 		patch_exception(0x1e0, exc_instruction_tlb_miss_htw_book3e);
 		break;
+#ifdef CONFIG_PPC_FSL_BOOK3E
 	case PPC_HTW_E6500:
 		patch_exception(0x1c0, exc_data_tlb_miss_e6500_book3e);
 		patch_exception(0x1e0, exc_instruction_tlb_miss_e6500_book3e);
 		break;
+#endif
 	}
 	pr_info("MMU: Book3E HW tablewalk %s\n",
 		book3e_htw_mode != PPC_HTW_NONE ? "enabled" : "not supported");