x86, NUMA: Move *_numa_init() invocations into initmem_init()

There's no reason for these to live in setup_arch().  Move them inside
initmem_init().

- v2: x86-32 initmem_init() weren't updated breaking 32bit builds.
  Fixed.  Found by Ankita.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ankita Garg <ankita@in.ibm.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index c9a139c..46e684f 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -719,8 +719,6 @@
 
 void __init setup_arch(char **cmdline_p)
 {
-	int acpi = 0;
-	int amd = 0;
 	unsigned long flags;
 
 #ifdef CONFIG_X86_32
@@ -991,19 +989,7 @@
 
 	early_acpi_boot_init();
 
-#ifdef CONFIG_ACPI_NUMA
-	/*
-	 * Parse SRAT to discover nodes.
-	 */
-	acpi = !x86_acpi_numa_init();
-#endif
-
-#ifdef CONFIG_AMD_NUMA
-	if (!acpi)
-		amd = !amd_numa_init();
-#endif
-
-	initmem_init(acpi, amd);
+	initmem_init();
 	memblock_find_dma_reserve();
 	dma32_reserve_bootmem();