Upgrade OpenSBI from v1.3 to v1.3.1 and the pre-built bios images
which fixes the boot failure seen when using QEMU to do a direct
kernel boot with Microchip Icicle Kit board machine.

The v1.3.1 release includes the following commits:

0907de3 lib: sbi: fix comment indent
eb736a5 lib: sbi_pmu: Avoid out of bounds access
7828eeb gpio/desginware: add Synopsys DesignWare APB GPIO support
c6a3573 lib: utils: Fix sbi_hartid_to_scratch() usage in ACLINT drivers
057eb10 lib: utils/gpio: Fix RV32 compile error for designware GPIO driver

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Message-Id: <20230719165817.889465-1-bmeng@tinylab.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>