[arm] Make ACLE builtins use arm_* namespace for expanders

[arm] Make ACLE builtins use arm_* namespace for expanders

The builtins from <arm_acle.h> use fairly general expander names such as
"crc", "mcr" etc.
These run the risk of being reserved by the midend in the future.
Let's namespace them to arm_* as is convention.

	* config/arm/arm-builtins.c (acle_builtin_data): Expand VAR1 to
	CODE_FOR_arm_##.
	* config/arm/arm.md (<crc_variant>): Rename to...
	(arm_<crc_variant>): ... This.
	(<cdp>): Rename to...
	(arm_<cdp>): ... This.
	(<ldc>): Rename to...
	(arm_<ldc>): ... This.
	(<stc>): Rename to...
	(arm_<stc>): ... This.
	(<mcr>): Rename to...
	(arm_<mcr>): ... This.
	(<mrc>): Rename to...
	(arm_<mrc>): ... This.
	(<mcrr>): Rename to...
	(arm_<mcrr>): ... This.
	(<mrrc>): Rename to...
	(arm_<mrrc>): ... This.

From-SVN: r273879