dt-bindings: iio: dac: ad3552r: fix maximum spi speed

stable inclusion
from stable-v6.6.64
commit 7451f7297e74f2ece05fc89a2411c2b4756165bb
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IBL4B6

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7451f7297e74f2ece05fc89a2411c2b4756165bb

--------------------------------

commit d1d1c117f39b2057d1e978f26a8bd9631ddb193b upstream.

Fix maximum SPI clock speed, as per datasheet (Rev. B, page 6).

Fixes: b0a96c5 ("dt-bindings: iio: dac: Add adi,ad3552r.yaml")
Cc: [email protected]
Signed-off-by: Angelo Dureghello <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Link: https://patch.msgid.link/20241003-wip-bl-ad3552r-axi-v0-iio-testing-v4-4-ceb157487329@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Wen Zhiwei <[email protected]>

Author: spectrum70

Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml

@@ -26,7 +26,7 @@ properties:
     maxItems: 1
 
   spi-max-frequency:
-    maximum: 30000000
+    maximum: 66000000
 
   reset-gpios:
     maxItems: 1