serial: allow selecting MSM debug UART with ARCH_IPQ40XX

Currently, DEBUG_UART_MSM depends on ARCH_SNAPDRAGON only, but IPQ40XX
devices also use the same UART HW so they can also use the debug UART.

So, allow selecting DEBUG_UART_MSM when using ARCH_IPQ40XX as well.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 8b19e26..1fe4607 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -321,7 +321,7 @@
 
 config DEBUG_UART_MSM
 	bool "Qualcomm QUP UART debug"
-	depends on ARCH_SNAPDRAGON
+	depends on ARCH_SNAPDRAGON || ARCH_IPQ40XX
 	help
 	  Select this to enable a debug UART using the serial_msm driver. You
 	  will need to provide parameters to make this work. The driver will