regmap: Restore L: linux-kernel@vger.kernel.org entry

As with commit 981c3a4ff85 (MAINTAINERS: Restore "L:
linux-kernel@vger.kernel.org" entries) restore the mailing list entry
for the regmap framework in order to assist users in finding the list
if they read the file instead of using get_maintainers.pl.

Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index aefa948..0bb827a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7550,6 +7550,7 @@
 
 REGISTER MAP ABSTRACTION
 M:	Mark Brown <broonie@kernel.org>
+L:	linux-kernel@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git
 S:	Supported
 F:	drivers/base/regmap/