drm/bridge: add 10ms delay for anx7625 resume

after powered on, 10ms is needed to wait anx7625 ocm init before
the next operation.

Change-Id: Iefd1b6e7351dd834517f6c6235324bb8c99c6bbb
Signed-off-by: Xiaowen Wu <wxiaowen@codeaurora.org>