x86: Drop CFG_SYS_STACK_SIZE

This is only used in one file and the value is the same for both boards
which define it. Use the fixed value of 32KB and drop the CFG. This will
allow removal of the config.h files.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> # Intel Edison
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/lib/physmem.c

@@ -14,6 +14,7 @@
 #include <asm/cpu.h>
 #include <asm/global_data.h>
 #include <linux/compiler.h>
+#include <linux/sizes.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -144,7 +145,7 @@ static void x86_phys_memset_page(phys_addr_t map_addr, uintptr_t offset, int c,
 
 	/* Make sure the window is below U-Boot. */
 	assert(window + LARGE_PAGE_SIZE <
-	       gd->relocaddr - CONFIG_SYS_MALLOC_LEN - CFG_SYS_STACK_SIZE);
+	       gd->relocaddr - CONFIG_SYS_MALLOC_LEN - SZ_32K);
 	/* Map the page into the window and then memset the appropriate part. */
 	x86_phys_map_page(window, map_addr, 1);
 	memset((void *)(window + offset), c, size);

include/configs/edison.h

@@ -8,8 +8,4 @@
 
 #include <asm/ibmpc.h>
 
-/* Miscellaneous configurable options */
-
-#define CFG_SYS_STACK_SIZE			(32 * 1024)
-
 #endif

include/configs/x86-common.h

@@ -10,16 +10,6 @@
 #ifndef __CONFIG_X86_COMMON_H
 #define __CONFIG_X86_COMMON_H
 
-/*-----------------------------------------------------------------------
- * CPU Features
- */
-
-#define CFG_SYS_STACK_SIZE			(32 * 1024)
-
-/*-----------------------------------------------------------------------
- * Environment configuration
- */
-
 /*-----------------------------------------------------------------------
  * USB configuration
  */