xtensa: add build support for AMD/Vangogh #39

Job	Run time
crosstool (ubuntu-latest)	2m 59s
toolchains (ubuntu-latest, aarch64-unknown-linux-gnu)	1h 0m 8s
toolchains (ubuntu-latest, arc-multilib-linux-uclibc)	51m 44s
toolchains (ubuntu-latest, arm-picolibc-eabi)	1h 36m 56s
toolchains (ubuntu-latest, arm-unknown-linux-gnueabi)	1h 21m 41s
toolchains (ubuntu-latest, armv6-nommu-linux-uclibcgnueabi)	50m 24s
toolchains (ubuntu-latest, mips-unknown-elf)	25m 33s
toolchains (ubuntu-latest, mips64-unknown-linux-gnu)	49m 24s
toolchains (ubuntu-latest, powerpc-unknown-linux-gnu)	57m 25s
toolchains (ubuntu-latest, powerpc64-unknown-linux-gnu)	55m 57s
toolchains (ubuntu-latest, riscv32-unknown-elf)	15m 0s
toolchains (ubuntu-latest, riscv64-unknown-elf)	28m 52s
toolchains (ubuntu-latest, s390-unknown-linux-gnu)	56m 26s
toolchains (ubuntu-latest, sh-multilib-linux-gnu)	1h 47m 22s
toolchains (ubuntu-latest, sparc-unknown-linux-gnu)	43m 0s
toolchains (ubuntu-latest, x86_64-unknown-linux-gnu)	1h 1m 9s
toolchains (ubuntu-latest, x86_64-multilib-linux-uclibc)	1h 23m 41s
toolchains (ubuntu-latest, xtensa-fsf-linux-uclibc)	44m 44s
	16h 12m 25s

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