ASoC: dwc: Update email id of the author

I moved from ST Microelectronics and the email-id no longer
exists. Update email-id to personal one,
Signed-off-by: NRajeev Kumar <rajeevkumar.linux@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/dwc/designware_i2s.c

@@ -4,7 +4,7 @@
  * sound/soc/dwc/designware_i2s.c
  *
  * Copyright (C) 2010 ST Microelectronics
- * Rajeev Kumar <rajeev-dlh.kumar@st.com>
+ * Rajeev Kumar <rajeevkumar.linux@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any