msm: ipa: Fix WDI2.0 stats

New stat param "num_qmb_int_handled" is added to rx_ch_stats
by IPA uC in WDI2.0. This results in a size mismatch and
WDI stats feature is broken. Make a change to update the
new param "num_qmb_int_handled" in rx_ch_stats structure.

Also make a change to read all the rx_ch_stats to avoid
printing stale values.

Change-Id: I5d141f531f1cfdab0bd0056041e22acb26657960
Acked-by: Chaitanya Pratapa <cpratapa@qti.qualcomm.com>
Signed-off-by: Utkarsh Saxena <usaxena@codeaurora.org>