mmc: cadence: use fdt32_t for DT property value to fix sparse warning

DTB is encoded in big endian.  When we retrieve property values,
we need to use fdt32_to_cpu (aka be32_to_cpu) for endian conversion.
This is a bit error-prone, but sparse is useful to detect endian
mismatch.

We need to use (fdt32_t *) instead of (u32 *) for a pointer of a
property value.  Otherwise sparse warns "cast to restricted __be32".

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

drivers/mmc/sdhci-cadence.c

@@ -92,7 +92,7 @@ static int sdhci_cdns_write_phy_reg(struct sdhci_cdns_plat *plat,
 static int sdhci_cdns_phy_init(struct sdhci_cdns_plat *plat,
 				const void *fdt, int nodeoffset)
 {
-	const u32 *prop;
+	const fdt32_t *prop;
 	int ret, i;
 
 	for (i = 0; i < ARRAY_SIZE(sdhci_cdns_phy_cfgs); i++) {