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