RISC-V: Make sure rv32q conflict won't affect the zfa gas testcases.

According to the commit 51498ab9abc6, the q extension was no longer allowed
for rv32 since version 2.2.  Therefore, make sure the version of q is larger
than 2.2, in case the new extension conflict breaks the toolchain regressions,
which built with the old -misa-spec.

gas/
	* testsuite/gas/riscv/zfa-zvfh.d: Set q to v2.2.
	* testsuite/gas/riscv/zfa.d: Likewise.