scsi: ufs: Remove unused min_uA field in struct ufs_vreg

There are two fields related to regulator current limit in struct ufs_vreg:
"min_uA" and "max_uA".

"max_uA" is probed by "<name>-max-microamp" property from device tree and
used for

 - regulator_set_load operations
 - icc_level configuration in device

However "min_uA" field is not used anywhere, thus we can remove it.
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufs.h

@@ -516,7 +516,6 @@ struct ufs_vreg {
 	bool enabled;
 	int min_uV;
 	int max_uV;
-	int min_uA;
 	int max_uA;
 };
 

drivers/scsi/ufs/ufshcd-pltfrm.c

@@ -165,7 +165,6 @@ static int ufshcd_populate_vreg(struct device *dev, const char *name,
 		goto out;
 	}
 
-	vreg->min_uA = 0;
 	if (!strcmp(name, "vcc")) {
 		if (of_property_read_bool(np, "vcc-supply-1p8")) {
 			vreg->min_uV = UFS_VREG_VCC_1P8_MIN_UV;