tty: serial: Limit msm_serial_hs driver to platforms that use it

The msm_serial_hs driver uses mach specific dma APIs. This is not
compatible with the multi-platform ARM effort. Let's only compile
this driver on MSM devices that are prepared to support it;
allowing the DT based MSM devices to enter the multi-platform ARM
build.
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>

drivers/tty/serial/Kconfig

@@ -1035,7 +1035,7 @@ config SERIAL_MSM_CONSOLE
 
 config SERIAL_MSM_HS
 	tristate "MSM UART High Speed: Serial Driver"
-	depends on ARCH_MSM
+	depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
 	select SERIAL_CORE
 	help
 	  If you have a machine based on MSM family of SoCs, you