The supported alias for building sparc 32-bit is "sparc32",
not "sparc", so update the alias documentation for that.
Just using "sparc" produces a 64-bit config file.
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>