armv8: layerscape: clean exported symbols in spintable.S

Add a new variable secondary_boot_code_start, which holds a pointer to
the start of the spin table code. This will help to relocate the code
section. While at it, move the size variable from the end to the
beginning so there is a common section for the variables. Remove any
other symbols.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
index 67764ee..7400b2c 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
@@ -54,7 +54,6 @@
 	fdt32_t *reg;
 	int addr_cells;
 	u64 val, core_id;
-	size_t *boot_code_size = &(__secondary_boot_code_size);
 	u32 mask = cpu_pos_mask();
 	int off_prev = -1;
 
@@ -145,11 +144,11 @@
 						    "cpu", 4);
 	}
 
-	fdt_add_mem_rsv(blob, (uintptr_t)&secondary_boot_code,
-			*boot_code_size);
+	fdt_add_mem_rsv(blob, (uintptr_t)secondary_boot_code_start,
+			secondary_boot_code_size);
 #if CONFIG_IS_ENABLED(EFI_LOADER)
-	efi_add_memory_map((uintptr_t)&secondary_boot_code, *boot_code_size,
-			   EFI_RESERVED_MEMORY_TYPE);
+	efi_add_memory_map((uintptr_t)secondary_boot_code_start,
+			   secondary_boot_code_size, EFI_RESERVED_MEMORY_TYPE);
 #endif
 }
 #endif