efi_loader: fix typo in efi_variable.c

%s/efi_efi_/efi_/

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index 1d1b23b..d6b75ca 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -148,7 +148,7 @@
 }
 
 /**
- * efi_efi_get_variable() - retrieve value of a UEFI variable
+ * efi_get_variable() - retrieve value of a UEFI variable
  *
  * This function implements the GetVariable runtime service.
  *
@@ -404,7 +404,7 @@
 }
 
 /**
- * efi_efi_set_variable() - set value of a UEFI variable
+ * efi_set_variable() - set value of a UEFI variable
  *
  * This function implements the SetVariable runtime service.
  *