Add RDMA support to falkor port.

Add RDMA support to falkor port.

	gcc/
	* config/aarch64/aarch64-cores.def (falkor): Add AARCH64_FL_RDMA.
	(qdf24xx): Likewise.
	* config/aarch64/aarch64-options-extensions.def (rdma); New.
	* config/aarch64/aarch64.h (AARCH64_FL_RDMA): New.
	(AARCH64_FL_V8_1): Renumber.
	(AARCH64_FL_FOR_ARCH8_1): Add AARCH64_FL_RDMA.
	(AARCH64_ISA_RDMA): Use AARCH64_FL_RDMA.
	* config/aarch64/arm_neon.h: Use +rdma instead of arch=armv8.1-a.
	* doc/invoke.texi (AArch64 Options): Mention +rmda in -march docs.  Add
	rdma to feature modifiers list.

	gcc/testsuite/
	* lib/target-supports.exp (add_options_for_arm_v8_1a_neon): Delete
	redundant -march option.
	(check_effective_target_arm_v8_1a_neon_ok_nocache): Try armv8-a+rdma
	in addition to armv8.1-a.

From-SVN: r250444