regulator: cpr3-regulator: Fix compilation error

Fix the compilation error introduced by commit 1b363ea70f03
("regulator: add snapshot of cpr3-regulator and dependent drivers").

Change-Id: Ic6b3982da6fd2c06aecdcfcfe0e92eed6df32881
Signed-off-by: Asha Magadi Venkateshamurthy <amagad@codeaurora.org>