mmc: meson-mx-sdio: replace spin_lock_irqsave by spin_lock in hard IRQ

The code has been in a irq-disabled context since it is hard IRQ. There
is no necessity to do it again.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/1604375323-33556-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/meson-mx-sdio.c

@@ -418,10 +418,9 @@ static irqreturn_t meson_mx_mmc_irq(int irq, void *data)
 {
 	struct meson_mx_mmc_host *host = (void *) data;
 	u32 irqs, send;
-	unsigned long irqflags;
 	irqreturn_t ret;
 
-	spin_lock_irqsave(&host->irq_lock, irqflags);
+	spin_lock(&host->irq_lock);
 
 	irqs = readl(host->base + MESON_MX_SDIO_IRQS);
 	send = readl(host->base + MESON_MX_SDIO_SEND);
@@ -434,7 +433,7 @@ static irqreturn_t meson_mx_mmc_irq(int irq, void *data)
 	/* finally ACK all pending interrupts */
 	writel(irqs, host->base + MESON_MX_SDIO_IRQS);
 
-	spin_unlock_irqrestore(&host->irq_lock, irqflags);
+	spin_unlock(&host->irq_lock);
 
 	return ret;
 }