Revert "arch: common: Add user can specify the nocache location"

This reverts commit 88f6851.

This is being reverted because it is redundant with the capabilities of
zephyr,memory-region and zephyr,memory-attr properties.

Signed-off-by: Declan Snyder <[email protected]>

Author: decsny

arch/common/nocache.ld

@@ -7,12 +7,6 @@
 
 /* Copied from linker.ld */
 
-#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_nocache_ram), okay)
-#define NOCACHE_REGION LINKER_DT_NODE_REGION_NAME_TOKEN(DT_CHOSEN(zephyr_nocache_ram))
-#else
-#define NOCACHE_REGION RAMABLE_REGION
-#endif
-
 /* Non-cached region of RAM */
 SECTION_DATA_PROLOGUE(_NOCACHE_SECTION_NAME,(NOLOAD),)
 {
@@ -33,5 +27,5 @@ SECTION_DATA_PROLOGUE(_NOCACHE_SECTION_NAME,(NOLOAD),)
 	MPU_ALIGN(_nocache_ram_size);
 #endif
 	_nocache_ram_end = .;
-} GROUP_DATA_LINK_IN(NOCACHE_REGION, NOCACHE_REGION)
+} GROUP_DATA_LINK_IN(RAMABLE_REGION, RAMABLE_REGION)
 _nocache_ram_size = _nocache_ram_end - _nocache_ram_start;