Description: mfd: syscon: Fix null pointer dereference in of_syscon_register()
References:
Notes:
 carnil> Introduced in e15d7f2b81d2 ("mfd: syscon: Use a unique name with
 carnil> regmap_config"). Vulnerable versions: 5.9-rc1.
Bugs:
upstream: released (6.8-rc1) [41673c66b3d0c09915698fec5c13b24336f18dd1]
6.7-upstream-stable: released (6.7.2) [7f2c410ac470959b88e03dadd94b7a0b71df7973]
6.6-upstream-stable: released (6.6.14) [3ef1130deee98997275904d9bfc37af75e1e906c]
6.1-upstream-stable: released (6.1.75) [527e8c5f3d00299822612c495d5adf1f8f43c001]
5.10-upstream-stable: released (5.10.209) [927626a2073887ee30ba00633260d4d203f8e875]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.6.15-1)
6.1-bookworm-security: released (6.1.76-1)
5.10-bullseye-security: released (5.10.209-1)
4.19-buster-security: N/A "Vulnerable code not present"