cmake: rename linker_final_pass.cmd to linker.cmd

Since linker_final_pass.cmd is the actual linker script being
used to link the final Zephyr binary, rename it to linker.cmd.

This also renames LINKER_PASS2 to LINKER_ZEPHYR_FINAL simply
to clarify what it is used for, instead of ambiguous pass #n.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>

include/linker/common-rom.ld

@@ -193,10 +193,10 @@
 	SECTION_DATA_PROLOGUE(device_handles,,)
 	{
 		__device_handles_start = .;
-#ifdef LINKER_PASS2
+#ifdef LINKER_ZEPHYR_FINAL
 		KEEP(*(SORT(.__device_handles_pass2*)));
-#else /* LINKER_PASS2 */
+#else /* LINKER_ZEPHYR_FINAL */
 		KEEP(*(SORT(.__device_handles_pass1*)));
-#endif /* LINKER_PASS2 */
+#endif /* LINKER_ZEPHYR_FINAL */
 		__device_handles_end = .;
 	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)

include/linker/intlist.ld

@@ -31,7 +31,7 @@
  * }
  */
 
-#ifndef LINKER_PASS2
+#ifndef LINKER_ZEPHYR_FINAL
 SECTION_PROLOGUE(.intList,,)
 {
 	KEEP(*(.irq_info))

include/linker/kobject-text.ld

@@ -12,7 +12,7 @@
 	*(".kobject_data.text*")
 	_kobject_text_area_end = .;
 	_kobject_text_area_used = _kobject_text_area_end - _kobject_text_area_start;
-#ifndef LINKER_PASS2
+#ifndef LINKER_ZEPHYR_FINAL
 #ifdef CONFIG_DYNAMIC_OBJECTS
 	PROVIDE(z_object_gperf_find = .);
 	PROVIDE(z_object_gperf_wordlist_foreach = .);

include/linker/kobject.ld

@@ -26,7 +26,7 @@
 	{
 	*(".kobject_data.data*")
 
-#ifndef LINKER_PASS2
+#ifndef LINKER_ZEPHYR_FINAL
 #ifdef CONFIG_DYNAMIC_OBJECTS
 	PROVIDE(_thread_idx_map = .);
 	. += CONFIG_MAX_THREAD_BYTES;