dt-bindings: pwm: samsung: add exynos8890 compatible

Add samsung,exynos8890-pwm compatible string to binding document.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Link: https://lore.kernel.org/r/20250914132033.2622886-1-ivo.ivanov.ivanov1@gmail.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>

Author: ivoszbg

Documentation/devicetree/bindings/pwm/pwm-samsung.yaml

@@ -31,6 +31,7 @@ properties:
           - enum:
               - samsung,exynos5433-pwm
               - samsung,exynos7-pwm
+              - samsung,exynos8890-pwm
               - samsung,exynosautov9-pwm
               - samsung,exynosautov920-pwm
               - tesla,fsd-pwm