kernel: bump 5.4 to 5.4.69

Seemingly unneeded based on new upstream code so manually deleted:
 layerscape:
  820-usb-0007-usb-dwc3-gadget-increase-timeout-value-for-send-ep-c.patch

Manually merged:
 generic-hack:
  251-sound_kconfig.patch

All other modifications made by update_kernel.sh

Build system: x86_64
Build-tested: ipq806x/R7800, ath79/generic, bcm27xx/bcm2711
Run-tested: ipq806x/R7800, lantiq/Easybox 904 xDSL

No dmesg regressions, everything functional

Signed-off-by: John Audia <graysky@archlinux.us>
[add lantiq test report, minor commit message clarification]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/lantiq/patches-5.4/0001-MIPS-lantiq-add-pcie-driver.patch

@@ -5480,7 +5480,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  	  (transaction layer end-to-end CRC checking).
 --- a/include/linux/pci.h
 +++ b/include/linux/pci.h
-@@ -1390,6 +1390,8 @@ void pci_walk_bus(struct pci_bus *top, i
+@@ -1389,6 +1389,8 @@ void pci_walk_bus(struct pci_bus *top, i
  		  void *userdata);
  int pci_cfg_space_size(struct pci_dev *dev);
  unsigned char pci_bus_max_busnr(struct pci_bus *bus);

target/linux/lantiq/patches-5.4/0004-MIPS-lantiq-add-atm-hack.patch

@@ -471,7 +471,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  	int		max_pcr;	/* maximum PCR in cells per second */
 --- a/net/atm/proc.c
 +++ b/net/atm/proc.c
-@@ -142,7 +142,7 @@ static void *vcc_seq_next(struct seq_fil
+@@ -141,7 +141,7 @@ static void *vcc_seq_next(struct seq_fil
  static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
  {
  	static const char *const class_name[] = {