msm_serial_hs: support proper handling of addresses

Handle address pointers appropriately in different architectures
and move platform data to architecture independent directory.
Client modules are changed to include the header from new location.

CRs-Fixed:  647392
Change-Id: I23bf3986b8fdb0337a528038c79535b919226128
Signed-off-by: Naveen Kaje <nkaje@codeaurora.org>