drm: move i915_pxp_tee_interface.h under include/drm/intel

Clean up the top level include/drm directory by grouping all the Intel
specific files under a common subdirectory.

Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5c1626978d2552ef5732dcf9427c903046afb9c1.1717075103.git.jani.nikula@intel.com

drivers/gpu/drm/i915/pxp/intel_pxp_tee.c

@@ -5,7 +5,7 @@
 
 #include <linux/component.h>
 
-#include <drm/i915_pxp_tee_interface.h>
+#include <drm/intel/i915_pxp_tee_interface.h>
 #include <drm/intel/i915_component.h>
 
 #include "gem/i915_gem_lmem.h"

drivers/misc/mei/pxp/mei_pxp.c

@@ -20,7 +20,7 @@
 #include <linux/component.h>
 #include <drm/drm_connector.h>
 #include <drm/intel/i915_component.h>
-#include <drm/i915_pxp_tee_interface.h>
+#include <drm/intel/i915_pxp_tee_interface.h>
 
 #include "mei_pxp.h"