drm/msm/dp: Refactor ioremap wrapper

In order to deal with multiple memory ranges in the following commit
change the ioremap wrapper to not poke directly into the dss_io_data
struct.

While at it, devm_ioremap_resource() already prints useful error
messages on failure, so omit the unnecessary prints from the caller.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20211001174400.981707-4-bjorn.andersson@linaro.org


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>