[PATCH] [Arm] Fix fpu configurations for Cortex-R7 and Cortex-R8

[PATCH] [Arm] Fix fpu configurations for Cortex-R7 and Cortex-R8

gcc/ChangeLog:
2018-11-29  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	PR target/88224
	* config/arm/arm-cpus.in (armv7-r): Add FP16conv configurations.
	(cortex-r7, cortex-r8): Update default and add new configuration.
	* doc/invoke.texi (armv7-r): Add two new vfp options.
	(nofp.dp): Add cortex-r7 and cortex-r8 to the list of targets that
	support this option.

From-SVN: r266612