linker: Place .tbss section in RAM, not FLASH

If this section is placed in FLASH, the section gets marked
as writable even though .tbss values will never be stored there.

Signed-off-by: Keith Packard <keithp@keithp.com>

cmake/linker_script/common/thread-local-storage.cmake

@@ -13,7 +13,7 @@ if(CONFIG_THREAD_LOCAL_STORAGE)
   zephyr_linker_section_configure(SECTION .tbss INPUT ".tbss.*")
   zephyr_linker_section_configure(SECTION .tbss INPUT ".gnu.linkonce.tb.*")
   zephyr_linker_section_configure(SECTION .tbss INPUT ".tcommon")
-  # GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
+  # GROUP_ROM_LINK_IN(RAMABLE_REGION, RAMABLE_REGION)
 
   #
   # These needs to be outside of the tdata/tbss

include/zephyr/linker/thread-local-storage.ld

@@ -8,10 +8,10 @@
 		*(.tdata .tdata.* .gnu.linkonce.td.*);
 	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
 
-	SECTION_DATA_PROLOGUE(tbss,,)
+	SECTION_DATA_PROLOGUE(tbss,(NOLOAD),)
 	{
 		*(.tbss .tbss.* .gnu.linkonce.tb.* .tcommon);
-	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
+	} GROUP_ROM_LINK_IN(RAMABLE_REGION, RAMABLE_REGION)
 
 	/*
 	 * These needs to be outside of the tdata/tbss