Remove reference to r.mfilter.fp

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@58151 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.mfilter/r.mfilter.html

@@ -1,6 +1,6 @@
 <h2>DESCRIPTION</h2>
 
-<em>r.mfilter.fp</em> filters the raster <em>input</em> to produce the
+<em>r.mfilter</em> filters the raster <em>input</em> to produce the
 raster <em>output</em> according to the matrix <em>filter</em> designed
 by the user (see <em>FILTERS</em> below).
 The filter is applied <em>repeat</em> times (default <em>value</em> is 1).