Description: malidp: Fix NULL vs IS_ERR() checking
References:
Notes:
 bwh> Introduced in 4.20 by commit 1f23a56a46b8 "drm/malidp: Enable
 bwh> MMU prefetch on Mali-DP650".
Bugs:
upstream: released (5.19-rc1) [15342f930ebebcfe36f2415049736a77d7d2e045]
6.1-upstream-stable: N/A "Fixed before branching point"
5.10-upstream-stable: released (5.10.173) [a5bbea50d622b8f49ab8ee3b0eb283107febcf1a]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.19.6-1)
6.1-bookworm-security: N/A "Fixed before branch point"
5.10-bullseye-security: released (5.10.178-1)
4.19-buster-security: N/A "Vulnerable code not present"