e1000e: Unroll PTP in probe error handling

e1000e: Unroll PTP in probe error handling

If probe fails after registering the PTP clock and its delayed work,
these resources must be released.

This was not an issue until a 2016 fix moved the e1000e_ptp_init() call
before the jump to err_register.

Fixes: aa524b66c5ef ("e1000e: don't modify SYSTIM registers during SIOCSHWTSTAMP ioctl")
Signed-off-by: Matt Vollrath <tactii@gmail.com>
Tested-by: Avigail Dahan <avigailx.dahan@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260416-iwl-net-submission-2026-04-14-v2-12-686c33c9828d@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>