[PATCH,RS6000 3/5] Rework the RS6000_BTM defines, continued.

[PATCH,RS6000 3/5] Rework the RS6000_BTM defines, continued.

The RS6000_BTM_<xxxx> definitions are mostly unused after
the rs6000 builtin code was reworked.   This cleans
up the remaining RS6000_BTM_<xxxx> references by replacing
them with their OPTION_MASK_<xxxx> equivalents.

This patch removes the defines
RS6000_BTM_MODULO, RS6000_BTM_ALTIVEC, RS6000_BTM_CMPB,
RS6000_BTM_VSX, RS6000_BTM_P8_VECTOR, RS6000_BTM_P9_VECTOR,
RS6000_BTM_P9_MISC, RS6000_BTM_CRYPTO, RS6000_BTM_HTM,
RS6000_BTM_FRE.

gcc/
	* config/rs6000/rs6000.cc (RS6000_BTM_ALTIVEC, RS6000_BTM_CMPB,
	RS6000_BTM_VSX, RS6000_BTM_FRE, RS6000_BTM_P8_VECTOR,
	RS6000_BTM_P9_VECTOR, RS6000_BTM_P9_MISC, RS6000_BTM_MODULO,
	RS6000_BTM_CRYPTO, RS6000_BTM_HTM): Replace with OPTION_MASK_ALTIVEC,
	OPTION_MASK_CMPB, OPTION_MASK_VSX, OPTION_MASK_POPCNTB,
	OPTION_MASK_P8_VECTOR, OPTION_MASK_P9_VECTOR, OPTION_MASK_P9_MISC,
	OPTION_MASK_MODULO, OPTION_MASK_CRYPTO, OPTION_MASK_HTM.
	* config/rs6000/rs6000.h (RS6000_BTM_MODULO, RS6000_BTM_ALTIVEC,
	RS6000_BTM_CMPB, RS6000_BTM_VSX, RS6000_BTM_P8_VECTOR,
	RS6000_BTM_P9_VECTOR, RS6000_BTM_P9_MISC, RS6000_BTM_CRYPTO,
	RS6000_BTM_HTM, RS6000_BTM_FRE): Remove.