power: axp: Avoid do_poweroff conflict with sysreset

The sysreset uclass has an option to provide the do_poweroff() function.
When that option is enabled, the AXP power drivers should not provide
their own definition.

For the AXP305, which is paired with 64-bit systems where TF-A provides
PSCI, there is another possible conflict with the PSCI firmware driver.
This driver can be enabled even if CONFIG_PSCI_RESET is disabled, so
make sure to use the right symbol in the condition.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/drivers/power/axp221.c b/drivers/power/axp221.c
index 3446fe7..d251c31 100644
--- a/drivers/power/axp221.c
+++ b/drivers/power/axp221.c
@@ -264,6 +264,7 @@
 	return 0;
 }
 
+#if !IS_ENABLED(CONFIG_SYSRESET_CMD_POWEROFF)
 int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	pmic_bus_write(AXP221_SHUTDOWN, AXP221_SHUTDOWN_POWEROFF);
@@ -274,3 +275,4 @@
 	/* not reached */
 	return 0;
 }
+#endif