supress-gcc-warnings: util-libs

-Use const in correct places
-Use casts
-Return correct interface type

Signed-off-by: Oliver Scott <Oliver.Scott@data61.csiro.au>

trivial: Fix function call typo

trivial: Style changed files

platsupport: Change pending_status 'clear' type

A bool for suggesting to clear the interrupt flag represents the type
better than an int.

platsupport: Replace read/write w/ set/read_level

This is the second part of the change to remove the ability the chain
together pins in the driver level. Now that it's not possible to chain
together pins, we replace the read/write functions with pin unit level
functions.

platsupport: Remove GPIO set_next and next field

The functionality to be able to chain together GPIO pins is outside the
scope of the driver, this functionality should instead belong to a
utility library. This commit removes this from the drivers so that it
can be refactored into a library.

platsupport: Don't require plat/gpio.h on all plat

The Arm interface for gpio_sys_t doesn't require any platform
definitions and so we don't need to include a platform header file.

platsupport: Don't require plat/mux.h on all plats

As mux_sys_init is currently required on all Arm platforms, having a
enum definition for all mux features that a platform has requires
defining the enum on all platforms.
We instead replace enum mux_feature with a typedef'd ssize_t and allow
platforms to define enum mux_feature definitions at an implementation
level rather than interface level.

util_libs: remove autoconf.h from util_libs

this commit removes autoconf.h generation from each lib and
append '#include <<lib_name>/gen_config.h>' after each
'#include <autoconf.h>' since autoconf.h is only the for the
kernel config now. This is a temporarily solution, since we
currently don't have a way to tell which header files each file
is trying to include when it includes 'autoconf.h'

platsupport: use ZF_LOG* instead of custom macros

This commit removes redundant definitions of debug print macros
and replaces them with use of ZF_LOG*.

platsupport: Exynos: Update the mux_feature_enable and its invocations

platsupport: Mux API: Add a dependencies parameter to mux_sys_init

This is a workaround for the fact that we have no real dependency tree at the
moment. The two approaches to this problem were either:
* Add a gpio_sys_t member inside of ps_io_ops_t, similar to the way we already have
a clock_sys_t and a mux_sys_t in there.
* Add a void *dependencies argument to the mux_init function that will enable us to
pass arbitrary extra dependencies in.

The latter was chosen because while it is more intrusive, it is slightly more
flexible.

Fix whitespace

- remove trailing whitespace
- remove duplicate blank lines
- remove blank lines at end of file

Change 1 << * to BIT(*) in some cases

fix licenses

Use CONFIG_ variables instead of configuration definitions

Remove trailing whitespace