mmc: sdhci-brcmstb: add cqhci suspend/resume to PM ops

cqhci timeouts observed on brcmstb platforms during suspend:
  ...
  [  164.832853] mmc0: cqhci: timeout for tag 18
  ...

Adding cqhci_suspend()/resume() calls to disable cqe
in sdhci_brcmstb_suspend()/resume() respectively to fix
CQE timeouts seen on PM suspend.

Fixes: d46ba2d ("mmc: sdhci-brcmstb: Add support for Command Queuing (CQE)")
Cc: stable@vger.kernel.org
Signed-off-by: Kamal Dasu <kamal.dasu@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20250311165946.28190-1-kamal.dasu@broadcom.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: Kamal Dasu

drivers/mmc/host/sdhci-brcmstb.c

@@ -503,8 +503,15 @@ static int sdhci_brcmstb_suspend(struct device *dev)
 	struct sdhci_host *host = dev_get_drvdata(dev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_brcmstb_priv *priv = sdhci_pltfm_priv(pltfm_host);
+	int ret;
 
 	clk_disable_unprepare(priv->base_clk);
+	if (host->mmc->caps2 & MMC_CAP2_CQE) {
+		ret = cqhci_suspend(host->mmc);
+		if (ret)
+			return ret;
+	}
+
 	return sdhci_pltfm_suspend(dev);
 }
 
@@ -529,6 +536,9 @@ static int sdhci_brcmstb_resume(struct device *dev)
 			ret = clk_set_rate(priv->base_clk, priv->base_freq_hz);
 	}
 
+	if (host->mmc->caps2 & MMC_CAP2_CQE)
+		ret = cqhci_resume(host->mmc);
+
 	return ret;
 }
 #endif