powerpc: Revert switch to TEXT_TEXT in linker script

Commit edada399 broke the build on 64-bit powerpc because it moved the
__ftr_alt_* sections of a file away from the .text section, causing
link failures due to relative conditional branch targets being too far
away from the branch instructions. This happens on pretty much all
64-bit powerpc configs.

This change reverts commit edada399 while preserving the update from
the *.refok sections to .ref.text that has happened since.

Signed-off-by: Tim Abbott <[e-mail]>
Requested-by: Paul Mackerras <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/powerpc/kernel/vmlinux.lds.S

···
 		ALIGN_FUNCTION();
 		HEAD_TEXT
 		_text = .;
-		TEXT_TEXT
-		*(.fixup __ftr_alt_*)
+		/* careful! __ftr_alt_* sections need to be close to .text */
+		*(.text .fixup __ftr_alt_* .ref.text)
 		SCHED_TEXT
 		LOCK_TEXT
 		KPROBES_TEXT