msm: ipa: Fix misleading registers numbering

Correct misleading numbering of registers on ipa-hal.
Fix the range of start and end reg_n numbers

Change-Id: Ib458d453968949d2d98454fa7560da6766a9b18e
Acked-by: Michal Amsterdam <mamsterd@qti.qualcomm.com>
Signed-off-by: Amir Levy <alevy@codeaurora.org>