.mailmap: update e-mail address for Eugen Hristev

Update e-mail address.

Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>

.mailmap

@@ -26,6 +26,7 @@ Bin Meng <bmeng.cn@gmail.com> <bin.meng@windriver.com>
 Boris Brezillon <bbrezillon@kernel.org> <boris.brezillon@bootlin.com>
 Boris Brezillon <bbrezillon@kernel.org> <boris.brezillon@free-electrons.com>
 Dirk Behme <dirk.behme@googlemail.com>
+Eugen Hristev <eugen.hristev@collabora.com> <eugen.hristev@microchip.com>
 Fabio Estevam <fabio.estevam@nxp.com>
 Heinrich Schuchardt <xypron.glpk@gmx.de> <heinrich.schuchardt@canonical.com>
 Heinrich Schuchardt <xypron.glpk@gmx.de> xypron.glpk@gmx.de <xypron.glpk@gmx.de>