doc: UEFI API documentation

Add some more files to the UEFI API documentation.

Correct some Sphinx comments.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_gop.c b/lib/efi_loader/efi_gop.c
index cad509b..1511e3b 100644
--- a/lib/efi_loader/efi_gop.c
+++ b/lib/efi_loader/efi_gop.c
@@ -319,7 +319,7 @@
  * details.
  *
  * @this:		the graphical output protocol
- * @model_number:	the mode to be set
+ * @mode_number:	the mode to be set
  * Return:		status code
  */
 static efi_status_t EFIAPI gop_set_mode(struct efi_gop *this, u32 mode_number)