regulator: arizona: Increase ramp delay for high current regulators

As per latest evaluation.

Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/arizona-ldo1.c

···
 	.min_uV = 900000,
 	.uV_step = 50000,
 	.n_voltages = 8,
-	.enable_time = 500,
+	.enable_time = 1500,
 
 	.owner = THIS_MODULE,
 };