msm: camera: icp: Support processor-specific HFI register offsets

The HFI interface registers will have a different base address
on the LX7 processor. We can utilize the newly added HFI ops to
abstract the calculation of the address by kicking that info out
to the device interface. The HFI register definitions have been
tweaked to support offsets based on the calculated addresses.

CRs-Fixed: 2722486
Change-Id: I93b9b2827ec0820eaac6ee2e6a611363b96a3223
Signed-off-by: Fernando Pacheco <fpacheco@codeaurora.org>