bnxt_ptp_init() calls bnxt_ptp_init_rtc() which will acquire the ptp_lock
spinlock.  The spinlock is not initialized until later.  Move the
bnxt_ptp_init_rtc() call after the spinlock is initialized.

Fixes: 24ac1ecd ("bnxt_en: Add driver support to use Real Time Counter for PTP")
Reviewed-by: NPavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: NSaravanan Vajravel <saravanan.vajravel@broadcom.com>
Reviewed-by: NAndy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: NSomnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: NDamodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>