NSIS: use 64bits registry for uninstaller too

Fixes #7409
(cherry picked from commit 37f1c06e61deb09948436ac7d115ed4d029334d7)

Fixes #8430
Signed-off-by: Rafaël Carré <funman@videolan.org>

extras/package/win32/vlc.win32.nsi.in

@@ -1174,6 +1174,7 @@ UAC_ElevationAborted:
     Abort
 
 UAC_Success:
+@HAVE_WIN64_TRUE@ SetRegView 64
     StrCmp 1 $3 +4
     StrCmp 3 $1 0 UAC_ElevationAborted
     MessageBox mb_iconstop "This installer requires admin access, try again"