kerneldoc: Add myself to the git-mailrc for kerneldoc

Add entry for kerneldoc into the git-mailrc pointing to the U-Boot ML
and myself.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/doc/git-mailrc b/doc/git-mailrc
index e7276d9..7f60ef1 100644
--- a/doc/git-mailrc
+++ b/doc/git-mailrc
@@ -96,6 +96,7 @@
 
 # Subsystem aliases
 alias cfi            uboot, stroese
+alias kerneldoc      uboot, marex
 alias fdt            uboot, Jerry Van Baren <vanbaren@cideas.com>
 alias i2c            uboot, hs
 alias mmc            uboot, afleming