kernel: bump 5.15 to 5.15.39

kernel: bump 5.15 to 5.15.39

Removed upstreamed:
  backport-5.15/850-v5.17-0001-PCI-pci-bridge-emul-Add-description-for-class_revisi.patch
  backport-5.15/850-v5.17-0002-PCI-pci-bridge-emul-Add-definitions-for-missing-capa.patch
  backport-5.15/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch
  backport-5.15/850-v5.17-0004-PCI-aardvark-Clear-all-MSIs-at-setup.patch
  backport-5.15/850-v5.17-0005-PCI-aardvark-Comment-actions-in-driver-remove-method.patch
  backport-5.15/850-v5.17-0006-PCI-aardvark-Disable-bus-mastering-when-unbinding-dr.patch
  backport-5.15/850-v5.17-0007-PCI-aardvark-Mask-all-interrupts-when-unbinding-driv.patch
  backport-5.15/850-v5.17-0008-PCI-aardvark-Fix-memory-leak-in-driver-unbind.patch
  backport-5.15/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch
  backport-5.15/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch
  backport-5.15/850-v5.17-0011-PCI-aardvark-Disable-common-PHY-when-unbinding-drive.patch
  pending-5.15/850-0001-PCI-aardvark-Replace-custom-PCIE_CORE_INT_-macros-wi.patch
  pending-5.15/850-0004-PCI-aardvark-Rewrite-IRQ-code-to-chained-IRQ-handler.patch
  pending-5.15/850-0005-PCI-aardvark-Check-return-value-of-generic_handle_do.patch
  pending-5.15/850-0006-PCI-aardvark-Make-MSI-irq_chip-structures-static-dri.patch
  pending-5.15/850-0007-PCI-aardvark-Make-msi_domain_info-structure-a-static.patch
  pending-5.15/850-0008-PCI-aardvark-Use-dev_fwnode-instead-of-of_node_to_fw.patch
  pending-5.15/850-0009-PCI-aardvark-Refactor-unmasking-summary-MSI-interrup.patch
  pending-5.15/850-0010-PCI-aardvark-Add-support-for-masking-MSI-interrupts.patch
  pending-5.15/850-0011-PCI-aardvark-Fix-setting-MSI-address.patc
  pending-5.15/850-0012-PCI-aardvark-Enable-MSI-X-support.patch
  pending-5.15/850-0013-PCI-aardvark-Add-support-for-ERR-interrupt-on-emulat.patch
  pending-5.15/850-0015-PCI-aardvark-Optimize-writing-PCI_EXP_RTCTL_PMEIE-an.patch
  pending-5.15/850-0016-PCI-aardvark-Add-support-for-PME-interrupts.patch
  pending-5.15/850-0017-PCI-aardvark-Fix-support-for-PME-requester-on-emulat.patch
  pending-5.15/850-0018-PCI-aardvark-Use-separate-INTA-interrupt-for-emulate.patch
  pending-5.15/850-0019-PCI-aardvark-Remove-irq_mask_ack-callback-for-INTx-i.patch
  pending-5.15/850-0020-PCI-aardvark-Don-t-mask-irq-when-mapping.patch
  pending-5.15/850-0021-PCI-aardvark-Drop-__maybe_unused-from-advk_pcie_disa.patch
  pending-5.15/850-0022-PCI-aardvark-Update-comment-about-link-going-down-af.patch

All patches automatically rebased.

Build system: x86_64
Build-tested: bcm2711/RPi4B, mt7622/RT3200
Run-tested: bcm2711/RPi4B, mt7622/RT3200

Signed-off-by: John Audia <therealgraysky@proton.me>