board: common: vid: Add board specific vdd adjust API

Adds a board specific API namely board_adjust_vdd which
is required to define the board VDD adjust settings.

Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

board/freescale/common/vid.c

@@ -34,6 +34,14 @@ int __weak board_vdd_drop_compensation(void)
 }
 
 /*
+ * Board specific settings for specific voltage value
+ */
+int __weak board_adjust_vdd(int vdd)
+{
+	return 0;
+}
+
+/*
  * Get the i2c address configuration for the IR regulator chip
  *
  * There are some variance in the RDB HW regarding the I2C address configuration
@@ -470,6 +478,11 @@ int adjust_vdd(ulong vdd_override)
 		vdd_last = set_voltage(i2caddress, vdd_current);
 	}
 
+	if (board_adjust_vdd(vdd_target) < 0) {
+		ret = -1;
+		goto exit;
+	}
+
 	if (vdd_last > 0)
 		printf("VID: Core voltage after adjustment is at %d mV\n",
 		       vdd_last);