firmware: xilinx: Don't share zynqmp_pm_init_finalize()

As there no longer any users outside the zynqmp firmware driver of
zynqmp_pm_init_finalize(), let's turn into a local static function.

Cc: Michal Simek <michal.simek@amd.com>
Tested-by: Hiago De Franco <hiago.franco@toradex.com> # Colibri iMX8X
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> # TI AM62A,Xilinx ZynqMP ZCU106
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20250701114733.636510-16-ulf.hansson@linaro.org

Author: Ulf Hansson

drivers/firmware/xilinx/zynqmp.c

@@ -1299,11 +1299,10 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_bootmode_write);
  * This API function is to be used for notify the power management controller
  * about the completed power management initialization.
  */
-int zynqmp_pm_init_finalize(void)
+static int zynqmp_pm_init_finalize(void)
 {
 	return zynqmp_pm_invoke_fn(PM_PM_INIT_FINALIZE, NULL, 0);
 }
-EXPORT_SYMBOL_GPL(zynqmp_pm_init_finalize);
 
 /**
  * zynqmp_pm_set_suspend_mode()	- Set system suspend mode

include/linux/firmware/xlnx-zynqmp.h

@@ -585,7 +585,6 @@ int zynqmp_pm_reset_assert(const u32 reset,
 int zynqmp_pm_reset_get_status(const u32 reset, u32 *status);
 unsigned int zynqmp_pm_bootmode_read(u32 *ps_mode);
 int zynqmp_pm_bootmode_write(u32 ps_mode);
-int zynqmp_pm_init_finalize(void);
 int zynqmp_pm_set_suspend_mode(u32 mode);
 int zynqmp_pm_request_node(const u32 node, const u32 capabilities,
 			   const u32 qos, const enum zynqmp_pm_request_ack ack);
@@ -746,11 +745,6 @@ static inline int zynqmp_pm_bootmode_write(u32 ps_mode)
 	return -ENODEV;
 }
 
-static inline int zynqmp_pm_init_finalize(void)
-{
-	return -ENODEV;
-}
-
 static inline int zynqmp_pm_set_suspend_mode(u32 mode)
 {
 	return -ENODEV;