fsl: esdhc: consolidate fsl_esdhc_cfg structure

We can use phys_addr_to for esdhc_base to discard
the #ifdef.

Signed-off-by: Peng Fan <van.freenix@gmail.com>
Cc: York Sun <york.sun@nxp.com>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Cc: Eric Nelson <eric@nelint.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: York Sun <york.sun@nxp.com>

include/fsl_esdhc.h

@@ -168,11 +168,7 @@
 #define ESDHC_VENDORSPEC_VSELECT 0x00000002 /* Use 1.8V */
 
 struct fsl_esdhc_cfg {
-#ifdef CONFIG_FSL_LAYERSCAPE
-	u64	esdhc_base;
-#else
-	u32	esdhc_base;
-#endif
+	phys_addr_t esdhc_base;
 	u32	sdhc_clk;
 	u8	max_bus_width;
 	struct mmc_config cfg;