imx: ventana: add appropriate delay following GSC i2c write

The Gateworks System Controller EEPROM config is flash based. Add a delay
following writes to avoid errors on back-to-back writes.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

board/gateworks/gw_ventana/gsc.c

@@ -57,7 +57,7 @@ int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
 			break;
 		mdelay(10);
 	}
-	mdelay(1);
+	mdelay(100);
 	return ret;
 }