SDL: Vita: add missing stub

SDL Commits
1 
From 6460151c8407ac644426167bd1b900cac2e34f94 Mon Sep 17 00:00:00 2001
From: Ivan Epifanov <[EMAIL REDACTED]>
Date: Mon, 21 Jun 2021 15:03:31 +0300
Subject: [PATCH] Vita: add missing stub

---
 CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b3c2ee4d7b..f69440b60e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2178,6 +2178,7 @@ elseif(VITA)
       SceTouch_stub
       SceHid_stub
       SceMotion_stub
+      ScePower_stub
       m
     )
     if(HAVE_VIDEO_VITA_PIB)