bif: qpnp-bsi: move BSI error and flag clearing to immediately before TX

Move functions calls which clear PMIC BSI hardware errors and
reset IRQ flags to immediately before BIF transmit calls.  This
ensures that the BSI RX and TX blocks are in the correct state
before errors are cleared.

Change-Id: Id266f076968d48484a9366274d30e8ff6f47dc23
Signed-off-by: David Collins <collinsd@codeaurora.org>