soc: riscv: riscv-privilege: opentitan: Fix PLIC interrupts

1. Fixes the number of interrupts in OpenTitan by default. This should
   be 32 + 185 = 217 IRQs, as there are 185 configurable registers,
   including interrupt 0.

2. Adds 2ND_LVL_INTR_00_OFFSET Kconfig, which is needed to generate a
   PLIC interrupt on IRQ 11.

Signed-off-by: Tyler Ng <tkng@rivosinc.com>
1 file changed