mmc: sdhci-pltfm: Do not use parent as the host's device

The code selecting a device for the sdhci host has been
continuously tweaked (4b711cb1
"mmc: sdhci-pltfm: Add structure for host-specific data" and
a4d2177f "mmc: sdhci-pltfm: dt
device does not pass parent to sdhci_alloc_host" while there
does not seem to be any reason to use platform device's parent
in the first place.

The comment saying "Some PCI-based MFD need the parent here"
seem to refer to Timberdale FPGA driver (the only MFD driver
registering SDHCI cell, drivers/mfd/timberdale.c) but again,
the only situation when parent device matter is runtime PM,
which is not implemented for Timberdale.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-pltfm.c

@@ -123,7 +123,6 @@ struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
 				    size_t priv_size)
 {
 	struct sdhci_host *host;
-	struct device_node *np = pdev->dev.of_node;
 	struct resource *iomem;
 	int ret;
 
@@ -136,11 +135,6 @@ struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
 	if (resource_size(iomem) < 0x100)
 		dev_err(&pdev->dev, "Invalid iomem size!\n");
 
-	/* Some PCI-based MFD need the parent here */
-	if (pdev->dev.parent != &platform_bus && !np)
-		host = sdhci_alloc_host(pdev->dev.parent,
-			sizeof(struct sdhci_pltfm_host) + priv_size);
-	else
 	host = sdhci_alloc_host(&pdev->dev,
 		sizeof(struct sdhci_pltfm_host) + priv_size);