pinctrl: msm: Add ability for drivers to supply a reserved GPIO list

When booting MSM based platforms with Device Tree or some ACPI
implementations, it is possible to provide a list of reserved pins
via the 'gpio-reserved-ranges' and 'gpios' properties respectively.
However some ACPI tables are not populated with this information,
thus it has to come from a knowledgable device driver instead.

Here we provide the MSM common driver with additional support to
parse this informtion and correctly populate the widely used
'valid_mask'.

Change-Id: I4958293d4694e5dbf09782508b58430b01cd3a35
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Git-commit: 4c0efbfb2669aa99e43e5deee30f39afd69cad65
Signed-off-by: Mayank Grover <groverm@codeaurora.org>