dt-bindings: PCI: renesas,r9a08g045s33-pcie: Fix naming properties

dt-bindings: PCI: renesas,r9a08g045s33-pcie: Fix naming properties

Fix a typo in interrupt-names: "ser_cor" should be "serr_cor" (System
Error Correctable).

Also convert interrupt-names, clock-names, and reset-names properties
from "description" to "const" to enable proper validation with
dtbs_check.

Fixes: e7534e790557 ("dt-bindings: PCI: Add Renesas RZ/G3S PCIe controller binding")
Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # RZ/V2N EVK
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260306143423.19562-6-john.madieu.xa@bp.renesas.com