docs: arm: convert docs to ReST and rename to *.rst

Converts ARM the text files to ReST, preparing them to be an
architecture book.

The conversion is actually:
  - add blank lines and identation in order to identify paragraphs;
  - fix tables markups;
  - add some lists markups;
  - mark literal blocks;
  - adjust title markups.

At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Reviewed-by Corentin Labbe <clabbe.montjoie@gmail.com> # For sun4i-ss

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a36ff61321ce..a4b22bbf0590 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1142,7 +1142,7 @@ config KUSER_HELPERS
           the system. This permits binaries to be run on ARMv4 through
           to ARMv8 without modification.
 
-          See Documentation/arm/kernel_user_helpers.txt for details.
+          See Documentation/arm/kernel_user_helpers.rst for details.
 
           However, the fixed address nature of these helpers can be used
           by ROP (return orientated programming) authors when creating