staging: ipack: swich to regular ioremap and friends.

Use the regular ioremap functions and their managed counterparts instead
of the ones provided through IPack callbacks.

Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>