Revert "drm/ast: Support 1600x900 with 108MHz PCLK"
This reverts commit 9bb7b689274b67ecb3641e399e76f84adc627df1.
This caused a regression reported to Red Hat.
Fixes: 9bb7b689274b ("drm/ast: Support 1600x900 with 108MHz PCLK")
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220120040527.552068-1-airlied@gmail.com
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