arch/x86: move 32-bit linker script to ia32/ directory

No functional changes. All references in soc/ are updated.

Signed-off-by: Charles E. Youse <charles.youse@intel.com>

soc/x86/apollo_lake/linker.ld

@@ -4,13 +4,6 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/**
- * @file
- * @brief Linker command/script file
- *
- * This is the linker script for both standard images and XIP images.
- */
-
 #include <autoconf.h>
 #include <generated_dts_board.h>
 /* physical address where the kernel is loaded */
@@ -44,5 +37,5 @@ MEMORY
 #endif
     }
 
-#include <arch/x86/linker.ld>
+#include <arch/x86/ia32/linker.ld>