Documentation: gpio: driver: fix wire name for I2C

Typo: the data line is called "SDA" not "SCA".
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Documentation/driver-api/gpio/driver.rst

@@ -135,7 +135,7 @@ This configuration is normally used as a way to achieve one of two things:
 - inverse wire-OR on an I/O line, for example a GPIO line, making it possible
   for any driving stage on the line to drive it low even if any other output
   to the same line is simultaneously driving it high. A special case of this
-  is driving the SCL and SCA lines of an I2C bus, which is by definition a
+  is driving the SCL and SDA lines of an I2C bus, which is by definition a
   wire-OR bus.
 
 Both usecases require that the line be equipped with a pull-up resistor. This