usb: host: ehci-msm: Drop redundant EHCI register writes

usb: host: ehci-msm: Drop redundant EHCI register writes

ehci_unregister() already clears the CMD_RUN bit with more careful checks.
It also ensures that we only do this in case we were actually in USB host
(rather than USB device) mode. It's not clear what the extra register
writes in the Qualcomm-specific ehci-msm driver are supposed to do, so just
drop them.

Signed-off-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Acked-by: Caleb Connolly <caleb.connolly@linaro.org>
Tested-by: Sam Day <me@samcday.com>
Link: https://patch.msgid.link/20250407-ehci-msm-fixes-v1-5-f8b30eb05d07@linaro.org
Signed-off-by: Casey Connolly <casey.connolly@linaro.org>