riscv: simplify longjmp
The value returned by setjmp must be nonzero. If zero is passed as
parameter it must be replaced by 1.
This patch reduces the code size a bit.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>