MAINTAINERS: Update Sriram Yagnaraman mail address

Due to company policies, I have changed my mail address. Updating
MAINTAINERS and .mailmap to show my latest mail address.

Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@ericsson.com>
Message-ID: <20240228080625.2412372-1-sriram.yagnaraman@ericsson.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

.mailmap

@@ -100,6 +100,7 @@ Philippe Mathieu-Daudé <philmd@linaro.org> <f4bug@amsat.org>
 Philippe Mathieu-Daudé <philmd@linaro.org> <philmd@redhat.com>
 Philippe Mathieu-Daudé <philmd@linaro.org> <philmd@fungible.com>
 Roman Bolshakov <rbolshakov@ddn.com> <r.bolshakov@yadro.com>
+Sriram Yagnaraman <sriram.yagnaraman@ericsson.com> <sriram.yagnaraman@est.tech>
 Stefan Brankovic <stefan.brankovic@syrmia.com> <stefan.brankovic@rt-rk.com.com>
 Stefan Weil <sw@weilnetz.de> Stefan Weil <stefan@weilnetz.de>
 Taylor Simpson <ltaylorsimpson@gmail.com> <tsimpson@quicinc.com>

MAINTAINERS

@@ -2478,7 +2478,7 @@ F: tests/qtest/libqos/e1000e.*
 
 igb
 M: Akihiko Odaki <akihiko.odaki@daynix.com>
-R: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
+R: Sriram Yagnaraman <sriram.yagnaraman@ericsson.com>
 S: Maintained
 F: docs/system/devices/igb.rst
 F: hw/net/igb*