mmc: meson-gx: Drop redundant WARN_ON() in the irq handler

The host pointer is already being dereferenced earlier, so let's just drop
the redundant WARN_ON.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20230622105327.77296-1-ulf.hansson@linaro.org

drivers/mmc/host/meson-gx-mmc.c

@@ -948,9 +948,6 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 		return IRQ_NONE;
 	}
 
-	if (WARN_ON(!host))
-		return IRQ_NONE;
-
 	/* ack all raised interrupts */
 	writel(status, host->regs + SD_EMMC_STATUS);