RISC-V: KVM: Fix check for local interrupts on riscv32

RISC-V: KVM: Fix check for local interrupts on riscv32

To set all 64 bits in the mask on a 32-bit system, the constant must
have type `unsigned long long`.

Fixes: 6b1e8ba4bac4 ("RISC-V: KVM: Use bitmap for irqs_pending and irqs_pending_mask")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/20251016001714.3889380-1-samuel.holland@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>