mmc: fsl_esdhc: fix f_max retrieval during init

for multi instance API we use struct fsl_esdhc_cfg to
pass the clock rate. Do not set f_max from global data,
since this is wrong for multi instance case.

Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Tested-by: Eric Nelson <eric.nelson@boundarydevices.com>
Reviewed-by: York Sun <yorksun@freescale.com>

drivers/mmc/fsl_esdhc.c

@@ -610,7 +610,7 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
 #endif
 
 	cfg->cfg.f_min = 400000;
-	cfg->cfg.f_max = min(gd->arch.sdhc_clk, 52000000);
+	cfg->cfg.f_max = min(cfg->sdhc_clk, 52000000);
 
 	cfg->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;