configs: qemu-riscvXX_spl_defconfig enable CMD_SBI

Both for 64bit and 32bit at least on one board we should compile the sbi
command. Enabling it on QEMU will allow to write a test for it.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2 files changed