waffle: Rely on cmake.bbclass to put cmake package files in dev package

cmake.bbclass now ensures that ${libdir}/cmake and ${datadir}/cmake end up
in the dev package, so this recipe doesn't need to do so itself.

(From OE-Core rev: f6b4f06c5b11860f02b896286471b5cbb57b66ae)

Signed-off-by: Mike Crowe <mac@mcrowe.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/waffle/waffle_1.5.2.bb

@@ -35,6 +35,3 @@ PACKAGECONFIG[gbm] = "-Dwaffle_has_gbm=1,-Dwaffle_has_gbm=0,virtual/${MLPREFIX}l
 
 # I say virtual/libgl, actually wants egl.pc
 PACKAGECONFIG[x11-egl] = "-Dwaffle_has_x11_egl=1,-Dwaffle_has_x11_egl=0,virtual/${MLPREFIX}libgl libxcb"
-
-FILES_${PN}-dev += "${datadir}/cmake/Modules/FindWaffle.cmake \
-                    ${libdir}/cmake/Waffle/"