mach-snapdragon: disable power-domains for pre-reloc drivers

Some devices like the UART and clock controller reference an RPM(h)
power domain. We don't support this device in U-Boot, so add
DM_FLAG_DEFAULT_PD_CTRL_OFF to tell DM core not to try and enable the
power domain.

Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/drivers/serial/serial_msm_geni.c b/drivers/serial/serial_msm_geni.c
index e5c3dcf..4aa0bc8 100644
--- a/drivers/serial/serial_msm_geni.c
+++ b/drivers/serial/serial_msm_geni.c
@@ -603,7 +603,7 @@
 	.priv_auto = sizeof(struct msm_serial_data),
 	.probe = msm_serial_probe,
 	.ops = &msm_serial_ops,
-	.flags = DM_FLAG_PRE_RELOC,
+	.flags = DM_FLAG_PRE_RELOC | DM_FLAG_DEFAULT_PD_CTRL_OFF,
 };
 
 #ifdef CONFIG_DEBUG_UART_MSM_GENI