efi: Tidy up header includes

Two files relies on efi_driver.h to include common.h and dm.h which is
incorrect. The former should always be included in a non-host C file and
the latter should be included if driver model is used.

Signed-off-by: Simon Glass <sjg@chromium.org>

lib/efi_driver/efi_block_device.c

@@ -30,6 +30,7 @@
 
 #include <common.h>
 #include <blk.h>
+#include <dm.h>
 #include <efi_driver.h>
 #include <malloc.h>
 #include <dm/device-internal.h>

lib/efi_driver/efi_uclass.c

@@ -17,6 +17,8 @@
  * controllers.
  */
 
+#include <common.h>
+#include <dm.h>
 #include <efi_driver.h>
 #include <log.h>
 #include <malloc.h>