Reviewed-by: Karl Palsson <karlp@tweak.net.au>

I apparently based memorymap.h on previously written header without noticing
that g0 has only one apb despite a big hole in the memory space and addresses
matching usual apb1/apb2 split..

Fixes some eeprom sizes, and adds all the -a and -x suffix parts.
Note that the explicit endings must be listed _before_ the base parts,
otherwise the matcher will find the wild card first.

Signed-off-by: Karl Palsson <karlp@etactica.com>

add register grouping, fixup comment have them pickedup by doxygen, align style and masks.

Add basically what's needed to have some minimal but usefull subset of
function for a timer: irqs, compare, period, out polarity, enable/disable
and start.

lptimer peripheral is present on f4,f7,l0,l4,g0,g4 and prob others. Extract
content from stm32l0 timer.h and make it usable by other chips.

It has never been an AF, it's always been an error to set this pin to
AF.

allows "make -j10" work properly

Minor, link the adc peripheral parameter in a couple of places

Instead of having some in peripheral_apis and some under the target
itself

Fixes the missing top level groupings here.

Drop incorrect/redundant type information from doxygen parameters
Adds groupings that are referred to.

Adds a summary page, and now we have the existing functions documented.

Make it visible

easier on the eyes reading the list of docs

Fix some direct includes, tag properly, include a stub file to pull in
shared header documentation and re-arrange some existing documentation
to make it present nicely.

Includes the sutb file ncessary to find shared headers without any apis

Tags were added, but without the stub file, common headers aren't picked
up by the auto source list generation

Include a stub .c file for shared code generation

Includes a stub .c file to trigger common code generation

Include a stub .c file to document the shared headers.

Includes a stub .c file until there are some APIs

Requires a stub .c file to make the common files be included until we
build some APIs.