DocBook/drm: basic -> core

Signed-off-by: Michael Witten <mfwitten@gmail.com>

Documentation/DocBook/drm.tmpl

@@ -455,7 +455,7 @@
 	  a GTT DRM MM object, which provides an address space pool for
 	  object allocation.  In a KMS configuration, the driver
 	  needs to allocate and initialize a command ring buffer following
-	  basic GEM initialization.  Most UMA devices have a so-called
+	  core GEM initialization.  Most UMA devices have a so-called
 	  "stolen" memory region, which provides space for the initial
 	  framebuffer and large, contiguous memory regions required by the
 	  device.  This space is not typically managed by GEM, and must