arch/risc-v/cmake: fix linker option case in Toolchain.cmake.#18768

simbit18 merged 1 commit intoapache:masterapache/nuttx:masterfrom

yanxingyu17:fix/risc-v-cmake-linker-option-typoyanxingyu17/nuttx-1:fix/risc-v-cmake-linker-option-typoCopy head branch name to clipboard