Fixed incorrect CORE-V hwlp masks

Created by: MaryBennett

gas/ChangeLog.COREV:

* config/tc-riscv.c: Fixed issue arising from incorrect CORE-V
    hardware loop masks and added support for xcorevhwlp.

gas/testsuite/ChangeLog.COREV:

    * gas/riscv/cv-hwloop-01.d: Changed march option to xcorehwlp.
    * gas/riscv/cv-hwloop-02.d: Likewise.
    * gas/riscv/cv-hwloop-03.d: Likewise.
    * gas/riscv/cv-hwloop-04.d: Likewise.
    * gas/riscv/cv-hwloop-05.d: Likewise.
    * gas/riscv/cv-hwloop-06.d: Likewise.
    * gas/riscv/cv-hwloop-07.d: Likewise.
    * gas/riscv/cv-hwloop-08.d: Likewise.
    * gas/riscv/cv-hwloop-count.d: Likewise.
    * gas/riscv/cv-hwloop-counti.d: Likewise.
    * gas/riscv/cv-hwloop-endi.d: Likewise.
    * gas/riscv/cv-hwloop-setup.d: Likewise.
    * gas/riscv/cv-hwloop-setupi.d: Likewise.
    * gas/riscv/cv-hwloop-starti.d: Likewise.
    * gas/riscv/cv-hwloop-09.d: Likewise.
    * gas/riscv/cv-hwloop-10.d: Likewise.
    * gas/riscv/cv-march-rv32i-xcorev.s: Added test for march option.
    * gas/riscv/cv-march-rv32i-xcorev.d: Likewise.

include/ChangeLog.COREV:

* opcode/riscv-opc.h: Fixed incorrect masks for CORE-V hardware loop
    instructions.
* opcode/riscv.h: Added support for xcorevhwlp.

ld/testsuite/ChangeLog.COREV:

* ld-riscv-elf/cv-hwloop-starti.d: Changed march option to xcorevhwlp.
    * ld-riscv-elf/cv-hwloop-endi.d: Likewise.
    * ld-riscv-elf/cv-hwloop-setup.d: Likewise.
    * ld-riscv-elf/cv-hwloop-setupi.d: Likewise.

opcodes/ChangeLog.COREV:

* riscv-opc.c: Added support for corevhwlp.

Signed-off-by: Mary Bennett mary.bennett@embecosm.com