aarch64: Add support for unpacked SVE conditional BIC

aarch64: Add support for unpacked SVE conditional BIC

This patch adds support for unpacked conditional BIC.  The type suffix
could be taken from the element size or the container size, so the
patch continues to use the element size.  This is consistent with
the existing support for unconditional BIC.

gcc/
	* config/aarch64/aarch64-sve.md (*cond_bic<mode>_2): Extend from
	SVE_FULL_I to SVE_I.
	(*cond_bic<mode>_any): Likewise.

gcc/testsuite/
	* g++.target/aarch64/sve/cond_bic_1.C: New test.
	* g++.target/aarch64/sve/cond_bic_2.C: Likewise.
	* g++.target/aarch64/sve/cond_bic_3.C: Likewise.
	* g++.target/aarch64/sve/cond_bic_4.C: Likewise.