[PATCH tty] sc16is7xx: fix Kconfig dependencies

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From: Jakub Kicinski <kubakici@xxxxx>

When I2C=m and SPI=y or-ing them will produce =y while
what we need is the lower bound, i.e. =m.  Fortunately
SPI is a boolean so we need to handle only one special
case.

Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
Signed-off-by: Jakub Kicinski <kubakici@xxxxx>
---
 drivers/tty/serial/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index a74dabc8f108..138fe7fe8e0b 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1185,7 +1185,7 @@ config SERIAL_SC16IS7XX_CORE
 config SERIAL_SC16IS7XX
         tristate "SC16IS7xx serial support"
         select SERIAL_CORE
-        depends on I2C || SPI_MASTER
+        depends on (SPI_MASTER && !I2C) || I2C
         help
           This selects support for SC16IS7xx serial ports.
           Supported ICs are SC16IS740, SC16IS741, SC16IS750, SC16IS752,
-- 
2.1.0

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