spmi: hisi-spmi-controller: Drop duplicated OF node assignment in spmi_controller_probe()

spmi: hisi-spmi-controller: Drop duplicated OF node assignment in spmi_controller_probe()

spmi_controller_probe() assigns a parent device and an OF node to an
SPMI controller. However, the operations are not needed as they are
already assigned in spmi_controller_alloc(). Thus, remove the duplicated
assignments. An unnecessary OF node reference acquisition is also
dropped by this patch.

Signed-off-by: Joe Hattori <joe@pf.is.s.u-tokyo.ac.jp>
Suggested-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20250116044907.2947218-1-joe@pf.is.s.u-tokyo.ac.jp
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20250116235339.300485-3-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>