riscv: thead: Fix failing XTheadCondMov tests (indirect-rv[32|64])

riscv: thead: Fix failing XTheadCondMov tests (indirect-rv[32|64])

Recently, two identical XTheadCondMov tests have been added, which both fail.
Let's fix that by changing the following:
* Merge both files into one (no need for separate tests for rv32 and rv64)
* Drop unrelated attribute check test (we already test for `th.mveqz`
  and `th.mvnez` instructions, so there is little additional value)
* Fix the pattern to allow matching

Fixes: a1806f0918c0 ("RISC-V: Optimize TARGET_XTHEADCONDMOV")
gcc/testsuite/ChangeLog:

	* gcc.target/riscv/xtheadcondmov-indirect-rv32.c: Moved to...
	* gcc.target/riscv/xtheadcondmov-indirect.c: ...here.
	* gcc.target/riscv/xtheadcondmov-indirect-rv64.c: Removed.

Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>