MAINTAINERS, git-mailrc: update the Power maintainer

Przemyslaw didn't maintain the PMIC anymore.
Update the pmic maintainer from Przeymyslaw to me.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/doc/git-mailrc b/doc/git-mailrc
index ec6a7db..b9b5929 100644
--- a/doc/git-mailrc
+++ b/doc/git-mailrc
@@ -39,7 +39,6 @@
 alias maxime	     Maxime Ripard <maxime.ripard@free-electrons.com>
 alias monstr         Michal Simek <monstr@monstr.eu>
 alias prafulla       Prafulla Wadaskar <prafulla@marvell.com>
-alias bobenstein     Przemyslaw Marczak <p.marczak@samsung.com>
 alias prom           Minkyu Kang <mk7.kang@samsung.com>
 alias rbohmer        Remy Bohmer <linux@bohmer.net>
 alias reinhardm      Reinhard Meyer <u-boot@emk-elektronik.de>
@@ -137,4 +136,4 @@
 alias video          uboot, ag
 alias patman         uboot, sjg
 alias buildman       uboot, sjg
-alias pmic           uboot, bobenstein
+alias pmic           uboot, jaehoon