Documentation: sunxi: Update A13 user manual dead link

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Documentation: sunxi: Update Allwinner SoC documentation

Since that document was first submitted, some new SoCs have been
announced/released by Allwinner. Update the documentation to mention
those and the related documents.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Documentation: dt: Remove interrupt sources list for Allwinner SoCs

That documentation was mostly useful when we didn't have any
documentation for those SoCs, which is not the case anymore. Remove
this, since it should live in the DT anyway.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Documentation: dt: Remove clock gates IDs list for Allwinner SoCs

That documentation was mostly useful when we didn't have any
documentation for those SoCs, which is not the case anymore. Remove
this, since it should live in the DT anyway.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mark Rutland <mark.rutland@arm.com>