[PATCH v2] Docs: iio: ad7191 Correct clock configuration

[Ammar Mustafa <ammarmustafa34@gmail.com>]

Correct the ad7191 documentation to match the datasheet:
- Fix inverted CLKSEL pin logic: device uses external clock when pin is
  inactive, and internal CMOS/crystal when high.
- Correct CMOS-compatible clock pin from MCLK2 to MCLK1.

Signed-off-by: Ammar Mustafa <ammarmustafa34@gmail.com>
---
Changes since v1:
- Instead of using "tied high" or "tied low", change to active or inactive
to remove confusion.
- Undo the swap of entries from previous patch.

 Documentation/iio/ad7191.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/iio/ad7191.rst b/Documentation/iio/ad7191.rst
index 977d4fea14b0..fd6a23ad44fd 100644
--- a/Documentation/iio/ad7191.rst
+++ b/Documentation/iio/ad7191.rst
@@ -63,11 +63,11 @@ Clock Configuration
 
 The AD7191 supports both internal and external clock sources:
 
-- When CLKSEL pin is tied LOW: Uses internal 4.92MHz clock (no clock property
+- When CLKSEL pin is ACTIVE: Uses internal 4.92MHz clock (no clock property
   needed)
-- When CLKSEL pin is tied HIGH: Requires external clock source
+- When CLKSEL pin is INACTIVE: Requires external clock source
   - Can be a crystal between MCLK1 and MCLK2 pins
-  - Or a CMOS-compatible clock driving MCLK2 pin
+  - Or a CMOS-compatible clock driving MCLK1 pin and MCLK2 left unconnected
   - Must specify the "clocks" property in device tree when using external clock
 
 SPI Interface Requirements
-- 
2.43.0