input: move qpnp-power-on driver into input/misc directory

Move the qpnp-power-on driver from the drivers/input directory
into the drivers/input/misc directory.  This is the standard
location where other power key drivers are kept.

Also make a small fix to use octal instead of symbolic
permissions for the ship_mode_en module parameter.

Change-Id: I4d80c2ca0f161bd443dbfe0fcef822459c9fe44b
Signed-off-by: David Collins <collinsd@codeaurora.org>