spi: spi-qcom-qspi: Use irq trigger flags from firmware

spi: spi-qcom-qspi: Use irq trigger flags from firmware

We don't need to force this to be trigger high here, as the firmware
properly configures the irq flags already. Drop it to save a line.

Cc: Douglas Anderson <dianders@chromium.org>
Cc: Rajendra Nayak <rnayak@codeaurora.org>
Cc: Mukesh Kumar Savaliya <msavaliy@codeaurora.org>
Cc: Akash Asthana <akashast@codeaurora.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20210112001301.687628-1-swboyd@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>