x86/setup: Use strscpy() to replace deprecated strlcpy()

x86/setup: Use strscpy() to replace deprecated strlcpy()

strlcpy() is marked deprecated and should not be used, because
it doesn't limit the source length.

The preferred interface for when strlcpy()'s return value is not
checked (truncation) is strscpy().

[ mingo: Tweaked the changelog ]

Signed-off-by: XueBing Chen <chenxuebing@jari.cn>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/730f0fef.a33.180fa69880f.Coremail.chenxuebing@jari.cn