configs/microchip_mpfs_icicle_defconfig: update RVC config option
Update the RISCV_ISA_RVC config option to match updated RISCV kconfig
instruction set options.
Signed-off-by: Jamie Gibbons <jamie.gibbons@microchip.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>