Update to 5.15-rc3
    
    - eliminated 3 patches:
      - patches.rpmify/scripts-sorttable-riscv-fix-undelcred-identifier-EM_.patch
      - patches.suse/posix-cpu-timers-Fix-spuriously-armed-0-value-itimer.patch
      - patches.suse/nvmem-nintendo-otp-add-dependency-on-CONFIG_HAS_IOME.patch
        (still meaningful in upstream but no longer needed four our configs)
    - refresh configs
      - drop NVMEM_NINTENDO_OTP
      - i386: drop XEN_PCIDEV_FRONTEND and SWIOTLB_XEN