upstreaming spi-nor: add support for is25wp{32,64,128,256}

Hi guys,

can you please upstream this patch:
https://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux.git/commit/?h=riscv-all&id=c6e4a154bd008655dd69a850275d5cb082a7304b

Expect for the prints in issi_unlock().

Thanks,
//richard

Thanks. I was waiting until I could properly vet it before send it upstream, but I guess maybe it's best to just send out the patch. It should be on the mailing list now.