Revert "[nrf fromlist] drivers: flash: nrf_qspi_nor: reject zero length transfer"

This reverts commit 4174ae9, which
was merged upstream as ed7fe16.

Signed-off-by: Martí Bolívar <[email protected]>

Author: mbolivar-nordic

drivers/flash/nrf_qspi_nor.c

@@ -503,7 +503,7 @@ static int qspi_nor_read(struct device *dev, off_t addr, void *dest,
 	/* Since the QSPI driver requires data to be at least 4 bytes we need
 	 * to use a 4 byte buffer for reads smaller than 4 bytes.
 	 */
-	if ((size > 0) && (size < 4U)) {
+	if (size < 4U) {
 		dest = buf;
 		size = sizeof(buf);
 	} else if ((size % 4U) != 0) {