efi_loader: improve documentation of enum efi_test_phase

* Avoid a warning: "Incorrect use of kernel-doc format".
* Remove duplicate text.
* Clarify usage of EFI_SETTING_VIRTUAL_ADDRESS_MAP.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/efi_selftest.h b/include/efi_selftest.h
index 07b6199..94ceb14 100644
--- a/include/efi_selftest.h
+++ b/include/efi_selftest.h
@@ -53,21 +53,25 @@
  */
 enum efi_test_phase {
 	/**
-	 * @EFI_EXECUTE_BEFORE_BOOTTIME_EXIT: - execute before ExitBootServices
+	 * @EFI_EXECUTE_BEFORE_BOOTTIME_EXIT:
 	 *
 	 * Setup, execute, and teardown are executed before ExitBootServices().
 	 */
 	EFI_EXECUTE_BEFORE_BOOTTIME_EXIT = 1,
 	/**
-	 * @EFI_SETUP_BEFORE_BOOTTIME_EXIT: - setup before ExitBootServices
+	 * @EFI_SETUP_BEFORE_BOOTTIME_EXIT:
 	 *
 	 * Setup is executed before ExitBootServices() while execute, and
 	 * teardown are executed after ExitBootServices().
 	 */
 	EFI_SETUP_BEFORE_BOOTTIME_EXIT,
 	/**
-	 * @EFI_SETTING_VIRTUAL_ADDRESS_MAP - calls SetVirtualAddressMap()
-	 * Execute calls SetVirtualAddressMap().
+	 * @EFI_SETTING_VIRTUAL_ADDRESS_MAP:
+	 *
+	 * Execute calls SetVirtualAddressMap(). Setup is executed before
+	 * ExitBootServices() while execute is executed after
+	 * ExitBootServices(), and after the execute of tests marked as
+	 * @EFI_SETUP_BEFORE_BOOTTIME_EXIT. Teardown is executed thereafter.
 	 */
 	EFI_SETTING_VIRTUAL_ADDRESS_MAP,
 };