msm: mdss: io-utils: add support for 64-bit arch

Port msm display io utils drivers to the 64-bit architecture.
Modify qualifiers in prints and ensure
pointer casts are done in an appropriate manner for 64-bit.

Signed-off-by: Manoj Rao <manojraj@codeaurora.org>
Change-Id: Idf5bc61125d98890bee1331a9b6651f482ea3fd2