power: smblite: Add smblite-reg header

Add snapshot of smblite-reg.h as of msm-4.19 'commit 765e7b83f670
("kernel: dma: disallow altering logical map for non-CMA allocs")'

smblite-reg.h is required by QPNP-SMBLITE driver.

Change-Id: I9b9a6e26e02b035d5dfa05a7c0c9a5e7f7158efd
Signed-off-by: Shyam Kumar Thella <sthella@codeaurora.org>