[PATCH v2 4/5] serial: 8250_mid: make module available only on X86

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There is no reason to compile module on non-X86 platforms, though COMPILE_TEST
is provided for sake of what it does.

While here, set default to SERIAL_8250 that user doesn't need an explicit
option to be set and hide it from non-expert.

Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/tty/serial/8250/Kconfig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 64742a0..eb45125 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -399,8 +399,10 @@ config SERIAL_8250_INGENIC
 	  its UARTs, say Y to this option. If unsure, say N.
 
 config SERIAL_8250_MID
-	tristate "Support for serial ports on Intel MID platforms"
+	tristate "Support for serial ports on Intel MID platforms" if EXPERT
+	default SERIAL_8250
 	depends on SERIAL_8250 && PCI
+	depends on X86 || COMPILE_TEST
 	select HSU_DMA if SERIAL_8250_DMA
 	select HSU_DMA_PCI if (HSU_DMA && X86_INTEL_MID)
 	select RATIONAL
-- 
2.8.0.rc3

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