Add AXP 15 power module for A10s Chips

HdG: Note as usual with code imported from the sunxi SDK there are severe
style issues :|

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
axp15: Hookup the axp152 code

HdG: Fixed some checkpatch warnings

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
mach-sun5i: Remove bogus debug-uart device

I encountered this while testing my A10s TV-stick, which uses uart0 for
its uart test-pads.

Having this device always registered + uart0_used set in the fex file,
caused 2 uart driver to get registered for uart0, both the regular
serial8250 as well as the 8250-sunxi driver, then when the first uart0
interrupt happens things go boom.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Platform code function rename to resolve gpiolib conflict

Signed-off-by: Alexandr V. Shutko <alex@shutko.ru>