media: MAINTAINERS: adjust entries to moving CEC USB drivers

Commit a8106818 ("media: move CEC USB drivers to a separate directory")
moved drivers/media/usb/{pulse8,rainshadow}-cec to
drivers/media/cec/usb/{rainshadow,pulse8}, but did not adjust the entries
in MAINTAINERS.

Since then, ./scripts/get_maintainer.pl --self-test=patterns complains:

  warning: no file matches F: drivers/media/usb/pulse8-cec/*
  warning: no file matches F: drivers/media/usb/rainshadow-cec/*

Update the MAINTAINERS entries to the new file locations.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

MAINTAINERS

@@ -13706,7 +13706,7 @@ L:	linux-media@vger.kernel.org
 S:	Maintained
 T:	git git://linuxtv.org/media_tree.git
 F:	Documentation/admin-guide/media/pulse8-cec.rst
-F:	drivers/media/usb/pulse8-cec/*
+F:	drivers/media/cec/usb/pulse8/
 
 PVRUSB2 VIDEO4LINUX DRIVER
 M:	Mike Isely <isely@pobox.com>
@@ -14122,7 +14122,7 @@ M:	Hans Verkuil <hverkuil@xs4all.nl>
 L:	linux-media@vger.kernel.org
 S:	Maintained
 T:	git git://linuxtv.org/media_tree.git
-F:	drivers/media/usb/rainshadow-cec/*
+F:	drivers/media/cec/usb/rainshadow/
 
 RALINK MIPS ARCHITECTURE
 M:	John Crispin <john@phrozen.org>