wifi: iwlwifi: pcie: move iwl_trans_pcie_dump_regs() to utils.c

wifi: iwlwifi: pcie: move iwl_trans_pcie_dump_regs() to utils.c

Move the iwl_trans_pcie_dump_regs() function to utils.c in the PCIe
directory since it operates on PCIe registers and is not
hardware-dependent.

Refactor the pcie_dbg_dumped_once indicator, previously part of the
iwl_trans_pcie struct, into a static variable within the
iwl_trans_pcie_dump_regs() function, where it is used.

Signed-off-by: Rotem Kerem <rotem.kerem@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250612144708.06950459ce97.I3105158eb9ae698efebe4b9ada1093aeb1f1b869@changeid