Hexagon (target/hexagon) Change Hexagon maintainer

Change Hexagon maintainer from Taylor Simpson to Brian Cain
Put Taylor's gmail address in .mailmap

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230524165355.3157700-2-tsimpson@quicinc.com>

.mailmap

@@ -78,6 +78,7 @@ Philippe Mathieu-Daudé <philmd@linaro.org> <philmd@redhat.com>
 Philippe Mathieu-Daudé <philmd@linaro.org> <philmd@fungible.com>
 Stefan Brankovic <stefan.brankovic@syrmia.com> <stefan.brankovic@rt-rk.com.com>
 Yongbok Kim <yongbok.kim@mips.com> <yongbok.kim@imgtec.com>
+Taylor Simpson <ltaylorsimpson@gmail.com> <tsimpson@quicinc.com>
 
 # Also list preferred name forms where people have changed their
 # git author config, or had utf8/latin1 encoding issues.

MAINTAINERS

@@ -218,7 +218,7 @@ F: tests/tcg/cris/
 F: disas/cris.c
 
 Hexagon TCG CPUs
-M: Taylor Simpson <tsimpson@quicinc.com>
+M: Brian Cain <bcain@quicinc.com>
 S: Supported
 F: target/hexagon/
 X: target/hexagon/idef-parser/