common: fix include guards for CONFIG_MP

This was breaking the build for some boards:
MPC8536DS MPC8536DS_36BIT MPC8536DS_SDCARD MPC8536DS_SPIFLASH qemu-ppce500

Include only these features for some PPC boards if the configuration for MultiProcessor
is enabled.

Signed-off-by: Gabriel Huau <contact@huau-gabriel.fr>
Cc: Tom Rini <trini@ti.com>
Cc: York Sun <yorksun@freescale.com>
Acked-by: York Sun <yorksun@freescale.com>

common/board_f.c

@@ -34,7 +34,7 @@
 #ifdef CONFIG_MPC5xxx
 #include <mpc5xxx.h>
 #endif
-#if (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
+#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
 #include <asm/mp.h>
 #endif
 
@@ -392,7 +392,7 @@ static int setup_dest_addr(void)
 	gd->ram_top = board_get_usable_ram_top(gd->mon_len);
 	gd->relocaddr = gd->ram_top;
 	debug("Ram top: %08lX\n", (ulong)gd->ram_top);
-#if (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
+#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
 	/*
 	 * We need to make sure the location we intend to put secondary core
 	 * boot code is reserved and not used by any part of u-boot