board/db410c: add missing linker map entries for efi

Otherwise the loaded image would miss the efi_runtime sections, and fall
over hard when grub (for example) tried to call runtime services located
in this section.

Signed-off-by: Rob Clark <robdclark@gmail.com>

board/qualcomm/dragonboard410c/u-boot.lds

@@ -43,6 +43,22 @@ SECTIONS
 
 	. = ALIGN(8);
 
+	.efi_runtime : {
+                __efi_runtime_start = .;
+		*(efi_runtime_text)
+		*(efi_runtime_data)
+                __efi_runtime_stop = .;
+	}
+
+	.efi_runtime_rel : {
+                __efi_runtime_rel_start = .;
+		*(.relaefi_runtime_text)
+		*(.relaefi_runtime_data)
+                __efi_runtime_rel_stop = .;
+	}
+
+	. = ALIGN(8);
+
 	.image_copy_end :
 	{
 		*(.__image_copy_end)