Use the newly introduced devm_ioremap_resource() instead of
devm_request_and_ioremap() which provides more consistent error handling.

devm_ioremap_resource() provides its own error messages; so all explicit
error messages can be removed from the failure code paths.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

APBPS2 is a PS/2 core part of GRLIB found in SPARC32/LEON
products.
Signed-off-by: NDaniel Hellstrom <daniel@gaisler.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>