doxy.cfg: Fixed to use updated include path

Change-Id: I21149d3dd3111eaf8c23ff8550a1303d339f5c5d

docs/doxygen-input/doxy.cfg

@@ -760,8 +760,8 @@ WARN_LOGFILE           =
 
 INPUT                  = $(HIP_PATH)/docs/doxygen-input/mainpage.txt \
                          $(HIP_PATH)/docs/doxygen-input/sync.txt \
-                         $(HIP_PATH)/include/ \
-                         $(HIP_PATH)/include/hcc_detail/ \
+                         $(HIP_PATH)/include/hip \
+                         $(HIP_PATH)/include/hip/hcc_detail/ \
                          $(HIP_PATH)/src/
 
 # This tag can be used to specify the character encoding of the source files