riscv: Improve warning in generate_cpu_nodes()

Let's print name of the ISA extension in warning if generate_cpu_nodes()
drops the ISA extension from generated ISA string due to lack of space.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20231128145628.413414-3-apatel@ventanamicro.com
Signed-off-by: Will Deacon <will@kernel.org>
1 file changed