hw/ssi: ibex_spi: update reg addr

Updates the `EVENT_ENABLE` register to offset `0x34` as per
OpenTitan spec [1].

[1] https://docs.opentitan.org/hw/ip/spi_host/doc/#Reg_event_enable

Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220823061201.132342-5-wilfred.mallawa@opensource.wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
1 file changed