spi: spi-msm-geni: Propagate missing change from 4.19 to 5.4

Propagate following change from 4.19 to 5.4 for SPI driver.
'commit 67192635d468 ("spi: spi-geni-qcom: Check for zero length
transfer")'.

Change-Id: I27bdd8b544ba1bdaa0a868d2260c4f76c156c215
Signed-off-by: Vipin Deep Kaur <vkaur@codeaurora.org>