spi: spi-cadence: Update ISR status variable type to irqreturn_t

Data type of status variable, that hold the return value of the ISR,
should be irqreturn_t & not u32. This patch updates status variable type
to irqreturn_t.

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Link: https://lore.kernel.org/r/20220512145025.20205-1-amit.kumar-mahapatra@xilinx.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Amit Kumar Mahapatra

drivers/spi/spi-cadence.c

@@ -342,7 +342,8 @@ static irqreturn_t cdns_spi_irq(int irq, void *dev_id)
 {
 	struct spi_master *master = dev_id;
 	struct cdns_spi *xspi = spi_master_get_devdata(master);
-	u32 intr_status, status;
+	irqreturn_t status;
+	u32 intr_status;
 
 	status = IRQ_NONE;
 	intr_status = cdns_spi_read(xspi, CDNS_SPI_ISR);