Fixed operand order for xcvbitmanip instructions

Files Changed:

gcc/config/riscv/

  * corev.md: Changed range operand order.

gcc/testsuite/gcc.target/riscv/

  * cv-march-xcvbitmanip-compile-extract.c: Changed range operand order.
  * cv-march-xcvbitmanip-compile-extractu.c: Likewise.
  * cv-march-xcvbitmanip-compile-insert.c: Likewise.