pinctrl: Add wakeup GPIO register and bit information for Bengal

Enable and populate wake_reg and wake_bit fields for the pin
groups for Bengal. This is needed to configure GPIOs as wake
up capable.

While at it, update the license header as well.

Change-Id: Ia0e4ed8a8dbca5322be336d3a34e442190b8351e
Signed-off-by: Kaushal Kumar <kaushalk@codeaurora.org>