MAINTAINERS: update DT binding doc locations
MAINTAINERS: update DT binding doc locations

After the recent moving of DT binding documents, some maintainers entries
are stale. Update them to the new locations.

In bindings/fb/, there were only 2 files and I'm assuming the FB
maintainers don't want to be copied on all of bindings/display/. So I've
dropped them.

Reported-by: Thierry Reding <b75a4d02013b0e68ae2c6bb0dcfd4b7bec282dc9@gmail.com>
Cc: Thierry Reding <b75a4d02013b0e68ae2c6bb0dcfd4b7bec282dc9@gmail.com>
Cc: Jianwei Wang <6328835c22d06e2ce8a01530d0f0f40a34508cda@gmail.com>
Cc: Alison Wang <15f748f6a2a4c8fd6cd0f25ca4711c8603a34551@freescale.com>
Cc: Philipp Zabel <db7328bbf81a38b011e8d0f5302fd54c788d0608@pengutronix.de>
Cc: Mark Yao <02a1f934a8f8e15762fa0cc676ca9ba75e0db935@rock-chips.com>
Cc: Benjamin Gaignard <6ee0a5bd5732730b243a6755a8505d5db9232205@linaro.org>
Cc: Vincent Abriou <c7c94f60d544985b756f117e3ec96ca87688c906@st.com>
Cc: Jean-Christophe Plagniol-Villard <9fc55922e47e21cb004bb878f69efa10ab51cf02@jcrosoft.com>
Cc: Tomi Valkeinen <e1ca4dbb8be1acaf20734fecd2da10ed1d46a9bb@ti.com>
Cc: James Hogan <547fa85bb3888a0222eed8ec39e36708605c6d53@imgtec.com>
Cc: Hans de Goede <9fa1be1a5b5729e4c6b404f34c9ce49ff4882fd8@redhat.com>
Cc: Vineet Gupta <af669d95a4c0de051445d4cafdbb2c5c4a2838be@synopsys.com>
Signed-off-by: Rob Herring <fbb37eacae100e13076d5c4b46f06cfa4d6fa9f8@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs