msm: mdss: pp: add support for 64-bit arch

Porting mdss-pp driver 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: I1bee15d5c29c238696b69b39718c008cc33f70b0