Document enums used by cl_arm_import_memory

Also reserve CL_IMPORT_TYPE_PROTECTED_ARM for an upcoming
extension.

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

xml/cl.xml

diff --git a/xml/cl.xml b/xml/cl.xml
index 7a7f623..e13859a 100644
--- a/xml/cl.xml
+++ b/xml/cl.xml
@@ -1022,7 +1022,10 @@
     <enums namespace="CL" start="0x40B0" end="0x40BF" vendor="ARM" comment="Per Bug 10337">
         <enum value="0x40B0"      name="CL_PRINTF_CALLBACK_ARM"/>
         <enum value="0x40B1"      name="CL_PRINTF_BUFFERSIZE_ARM"/>
-            <unused start="0x40B2" end="0x40B5"/>
+        <enum value="0x40B2"      name="CL_IMPORT_TYPE_ARM"/>
+        <enum value="0x40B3"      name="CL_IMPORT_TYPE_HOST_ARM"/>
+        <enum value="0x40B4"      name="CL_IMPORT_TYPE_DMA_BUF_ARM"/>
+        <enum value="0x40B5"      name="CL_IMPORT_TYPE_PROTECTED_ARM"/>
         <enum value="0x40B6"      name="CL_DEVICE_SVM_CAPABILITIES_ARM"/>
         <enum value="0x40B7"      name="CL_MEM_USES_SVM_POINTER_ARM"/>
         <enum value="0x40B8"      name="CL_KERNEL_EXEC_INFO_SVM_PTRS_ARM"/>