debug: Clean up thread awareness data sections

There's no need to duplicate the linker section for each architecture.
Instead, move the section declaration to common-rom.ld.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>

include/arch/arc/v2/linker.ld

@@ -101,8 +101,6 @@ SECTIONS {
 #include <linker/thread-local-storage.ld>
 
 	SECTION_PROLOGUE(_RODATA_SECTION_NAME,,) {
-		KEEP(*(.openocd_dbg))
-		KEEP(*(".openocd_dbg.*"))
 		*(".rodata")
 		*(".rodata.*")
 		*(.gnu.linkonce.r.*)

include/arch/arm/aarch64/scripts/linker.ld

@@ -162,9 +162,6 @@ SECTIONS
     {
         KEEP(*(_IRQ_VECTOR_TABLE_SECTION_SYMS))
 
-        KEEP(*(.openocd_dbg))
-        KEEP(*(".openocd_dbg.*"))
-
         *(.rodata)
         *(".rodata.*")
         *(.gnu.linkonce.r.*)

include/arch/nios2/linker.ld

@@ -124,8 +124,6 @@ SECTIONS
         *(.text)
         *(".text.*")
         *(.gnu.linkonce.t.*)
-        KEEP(*(.openocd_dbg))
-        KEEP(*(".openocd_dbg.*"))
         } GROUP_LINK_IN(ROMABLE_REGION)
 
     _image_text_end = .;

include/arch/x86/ia32/linker.ld

@@ -119,8 +119,6 @@ SECTIONS
 	*(.init)
 	*(.fini)
 	*(.eini)
-	KEEP(*(.openocd_dbg))
-	KEEP(*(".openocd_dbg.*"))
 
 #include <linker/kobject-text.ld>