power: qpnp-smb2: Use chg_param.smb_version in place of smb_version

Modify the qpnp-smb2.c, smb-lib.c and smb-lib.h files to use
chg_param.smb_version instead of smb_version to comply with the new
charger_param structure added in battery.h.

Change-Id: I8d1ae454be0c6f98b1fb070d4a99fb21cc486fce
Signed-off-by: Shilpa Suresh <sbsure@codeaurora.org>