x86: Fix board init breakage

Commit ecc30663 ("Fix board init code to respect the C runtime environment")
breaks x86. This was mentioned on https://patchwork.ozlabs.org/patch/548644
but not addressed. Correct it so that x86 boards boot again.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

common/init/board_init.c

@@ -128,7 +128,7 @@ void board_init_f_init_reserve(ulong base)
 		*ptr++ = 0;
 #endif
 	/* set GD unless architecture did it already */
-#if !defined(CONFIG_X86) && !defined(CONFIG_ARM)
+#if !defined(CONFIG_ARM)
 	arch_setup_gd(gd_ptr);
 #endif
 	/* next alloc will be higher by one GD plus 16-byte alignment */